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testNo=5215&code=1052000&showTest=345&actForm=edit&set=1

Seat No -
Total number of questions : 60
1000531_T1 BASIC ELECTRONICS ENGINEERING
Time : 1hr
Max Marks : 50
N.B

1) All questions are Multiple Choice Questions having single correct option.

2) Attempt any 50 questions out of 60.

3) Use of calculator is allowed.

4) Each question carries 1 Mark.

5) Specially abled students are allowed 20 minutes extra for examination.

6) Do not use pencils to darken answer.

7) Use only black/blue ball point pen to darken the appropriate circle.

8) No change will be allowed once the answer is marked on OMR Sheet.

9) Rough work shall not be done on OMR sheet or on question paper.

10) Darken ONLY ONE CIRCLE for each answer.

Q.no 1. Which of the following materials can be used to produce infrared LED?

A : Si

B : GaAs

C : CdS

D : PbS

Q.no 2. The base of an npn transistor is thin and

A : Heavily doped

B : Lightly doped

C : Metallic

D : Doped by a pentavalent material

Q.no 3. In a P-N-P transistor, the current carriers are _______

A : acceptor ions

B : donor ions

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C : free electrons

D : holes

Q.no 4. DSO is an ______________ device

A : Output

B : Input

C : Standby

D : None of these

Q.no 5. Inversion of single bit input to a single bit output using

A : NOT gate

B : NOR gate

C : AND gate

D : NAND gate

Q.no 6. Number of inputs and outputs in half adder are

A : 2,2

B : 2.3

C : 3,2

D : 3,3

Q.no 7. Base of N-P-N transistor is_____

A : Lightly dopped

B : Heavily dopped

C : Moderately dopped

D : Not dopped

Q.no 8. A doped semiconductor is also known as

A : Intrinsic semiconductor

B : Extrinsic semiconductor

C : Diffused semiconductor

D : None of the above

Q.no 9. Which of the following is a passive component?

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A : Vacumm tube devices

B : Capacitors

C: Semiconductor devices

D : Relays

Q.no 10. Voltmeter is used to measure ______

A : Voltage

B : AM signal

C : Current

D : frequency

Q.no 11. Full form of SIPO is

A : Serial in Parallel out

B : Serial in Serial out

C : Parallel in Serial out

D : Serial in Peripheral out

Q.no 12. Maximum average load voltage VLdc for Full wave rectifier is given as _____

A : Vm/π

B : 2Vm/π

C : 3Vm/π

D : Vm/2π

Q.no 13. Number of inputs and outputs in full adder are

A : 2,2

B : 2.3

C : 3,2

D : 3,3

Q.no 14. When a silicon diode is forward biased, what is VBE for a C-E configuration?

A : voltage-divider bias

B : 0.4 V

C : 0.7 V
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D : emitter voltage

Q.no 15. Number of diodes used in Bridge type Full Wave Rectifier

A : One

B : Two

C : Four

D : Three

Q.no 16. In a transistor, the base current is about ________ of emitter current.

A : 0.25

B : 0.2

C : 0.35

D : 05

Q.no 17. For a silicon P-N junction diode, the barrier potential is about

A: 0.7 V

B: 0.8 V

C: 0.9 V

D: 1.0 V

Q.no 18. A transistor has _____________

A : one pn junction

B : two pn junctions

C : three pn junctions

D : four pn junctions

Q.no 19. The logic gate which detects equality of two bits is

A : EX-OR

B : EX-NOR

C : NOR

D : NAND

Q.no 20. A.B represents a ______ gate.

A : AND
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B : OR

C : NAND

D : NOR

Q.no 21. Gain of common emitter amplifier is determine by the ratio of ac output voltage to
input

A : collector voltage

B : emitter voltage

C : base voltage

D : drain voltage

Q.no 22. Rectifier converts ________ signal to _________ signal

A : AC to DC

B : DC to AC

C : DC to DC

D : AC to AC

Q.no 23. Number of diodes used in Half Wave Rectifier

A : One

B : Two

C : Four

D : Six

Q.no 24. In a BJT

A : The base region is sandwiched between emitter and collector

B : The collector is sandwiched between base and emitter

C : The emitter region is sandwiched between base and collector

D : The drain region is sandwiched between emitter and collector

Q.no 25. Voltmeter is connected in ____________ with load in circuit

A : Series

B : Parallel

C : Both A & B

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D : None of the above

Q.no 26. Special kind of CRO which can store the waveforms in digital form is
called______________

A : ROM

B : RAM

C : DSO

D : Autotransformer

Q.no 27. Function Generator produces __________waves

A : Sine

B : Sawtooth

C : Square

D : All of these mentioned

Q.no 28. The output of a logic gate is 1 when all its inputs are at logic 1, the gate is either

A : A NAND or a NOR

B : An AND or an OR

C : An OR or an X-OR

D : An AND or a NOR

Q.no 29. 14 pin TTL IC 74266 is ___________gate IC.

A : EX-OR

B : NOR

C : NAND

D : EX-NOR

Q.no 30. Transistor biasing represents______ conditions.

A : a.c.

B : d.c.

C : both a.c. and d.c.

D : neither a.c. nor d.c.

Q.no 31. A current ratio of IC/IE is usually less than one and is called as

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A : beta

B : theta

C : alpha

D : omega

Q.no 32. ____ is used to implement the Booleans functions

A : logical notation

B : Arithmetic logics

C : logic gates

D : Expressions

Q.no 33. For the same excitation voltage and winding currents, the autotransformer gives

A : Less output than two winding transformer

B : Equal to the output of two winding transformer

C : Half of the output of two winding transformer

D : More than the output of the two winding transformer

Q.no 34. The CB configuration is used to provide which type of gain?

A : voltage

B : current

C : resistance

D : power

Q.no 35. Which of the following materials can be used to make a light-emitting diode?

A : Silicon

B: Germanium

C: Gallium Arsenide

D : Phosphorescent material

Q.no 36. During reverse bias in a diode , a small current develops known as______.

A : Forward current

B : Reverse active current

C : Reverse saturation current

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D : Active current

Q.no 37. What is the main advantage of using a digital storage oscilloscope?

A : Uses digital storage

B : Uses analog storage

C : Uses mixed mode storage

D : Uses disc storage

Q.no 38. Diode is forward biased , the forward resistance is

A : Low

B : High

C : Constant

D : None of the above

Q.no 39. PIN diode is a photosensitive diode because of _______

A : large current flow in p and n region

B : depletion layer increases giving a larger surface area

C : stronger covalent bonds

D : low carrier storage

Q.no 40. According to boolean law A + 1 = ___

A:1

B:A

C:0

D : A'

Q.no 41. The number of depletion layers in a transistor is __________

A : Four

B : Three

C : One

D : Two

Q.no 42. 14 pin TTL IC 7400 is ___________gate IC.

A : EX-OR
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B : NOR

C : NAND

D : EX-NOR

Q.no 43. Which is the higher gain provided by a C-E configuration?

A : Power

B : Voltage

C : Current

D : Resistance

Q.no 44. Ripple factor for Full Wave Rectifier is

A : 0.45

B : 0.48

C : 0.52

D : 0.82

Q.no 45. 14 pin 2 input AND gate has _____ gates.

A:3

B:4

C:5

D:6

Q.no 46. For an ideal diode which of the following is true?

A : It allows the passage of current in the forward bias with zero potential drop across the diode

B : It does not allow the flow of current in reverse bias

C : It offers zero resistance in forward bias & infinity resistance in reverse bias.

D : All of the mentioned above

Q.no 47. A differential amplifier, amplifies

A : and mathematically differentiates the average of the voltages on the two input lines

B : and differentiates the input waveform on one line when the other line is grounded

C : the difference of voltages between the two input lines

D : and differentiates the sum of the two input waveforms

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Q.no 48. In a transistor if β = 100 and collector current is 10 mA, then IE is _______

A : 10 mA

B : 10.1 mA

C : 11.0 mA

D : 11.1 mA

Q.no 49. A ‘literal’ in Boolean Algebra means

A : a variable in its uncomplemented form only

B : a variable ORed with its complement

C : a variable in its complemented form only

D : a variable in its complemented form or uncomplemented form

Q.no 50. To operate in active region, transistor's base-emitter junction must be forward
biased and ________junction is reverse bias.

A : collector-emitter

B : base-collector

C : base-emitter

D : collector-base

Q.no 51. Transistor biasing is done to keep_________in the circuit.

A : proper direct current

B : proper alternating current

C : the base current small

D : collector current small

Q.no 52. For Bridge Wave Rectifier, Transformer Utilization Factor is given as_________

A : 0.48

B : 0.287

C : 0.6933

D : 0.81

Q.no 53. C-E configuration is used as amplifier because of its…..

A : voltage gain

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B : current gain

C : resistance gain

D : power gain

Q.no 54. 1+1+1

A : S=1,C=0

B : S=1,C=1

C : S=0,C=1

D : S=0,C=0

Q.no 55. 1+1+0

A : S=1,C=0

B : S=1,C=1

C : S=0,C=1

D : S=0,C=0

Q.no 56. Drift current is due to ___________

A : Applied electric field over a given distance

B : Random motion of electrons

C : Random motion of holes

D : Recombination of holes and electrons

Q.no 57. What makes up the total current in a semi-conductor?

A : Only diffusion current

B : Only drift current

C : drift+diffusion current

D : None of the above

Q.no 58. Autotransformer is special type of transformer with

A : Common for Primary and Secondary winding

B : Primary winding more than Secondary winding

C : Secondary winding more than Primary windings

D : No winding
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Q.no 59. The fan-out of a MOS-logic gate is higher than that of TTL gates because of its

A : low input impedance

B : low output impedance

C : high input impedance

D : high output impedance

Q.no 60. The basic difference between square wave and pulse generator is based on its____.

A : Wavform amplitude

B : Frequency Range

C : Cost

D : Duty Cycle

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Seat No -
Total number of questions : 60
1000531_T1 BASIC ELECTRONICS ENGINEERING
Time : 1hr
Max Marks : 50
N.B

1) All questions are Multiple Choice Questions having single correct option.

2) Attempt any 50 questions out of 60.

3) Use of calculator is allowed.

4) Each question carries 1 Mark.

5) Specially abled students are allowed 20 minutes extra for examination.

6) Do not use pencils to darken answer.

7) Use only black/blue ball point pen to darken the appropriate circle.

8) No change will be allowed once the answer is marked on OMR Sheet.

9) Rough work shall not be done on OMR sheet or on question paper.

10) Darken ONLY ONE CIRCLE for each answer.

Q.no 1. Full form of SIPO is

A : Serial in Parallel out

B : Serial in Serial out

C : Parallel in Serial out

D : Serial in Peripheral out

Q.no 2. Output of common emitter amplifier is at

A : collector

B : emitter

C : base

D : drain

Q.no 3. Base of N-P-N transistor is_____

A : Lightly dopped

B : Heavily dopped

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C : Moderately dopped

D : Not dopped

Q.no 4. When a silicon diode is forward biased, what is VBE for a C-E configuration?

A : voltage-divider bias

B : 0.4 V

C : 0.7 V

D : emitter voltage

Q.no 5. The logic gate which detects equality of two bits is

A : EX-OR

B : EX-NOR

C : NOR

D : NAND

Q.no 6. CRO stands for ____________

A : Cathode Ray Oscilloscope

B : Carbon Ray Oscilloscope

C : Cathode Rod Oscilloscope

D : Cathode Rod Oxymeter

Q.no 7. PIV in Bridge Rectifier is given as ____________

A : Vm

B : 2Vm

C : 3Vm

D : Vm/π

Q.no 8. The forward region of a semiconductor diode characteristic curve is where diode
appears as

A : Inductor

B : An ON switch

C : An OFF switch

D : Capacitor

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Q.no 9. Voltmeter is connected in ____________ with load in circuit

A : Series

B : Parallel

C : Both A & B

D : None of the above

Q.no 10. Ammeter is connected in ______________ with load in circuit

A : Series

B : Parallel

C : Both A & B

D : None of the above

Q.no 11. DSO is an ______________ device

A : Output

B : Input

C : Standby

D : None of these

Q.no 12. In a transistor, collector current is controlled by

A : collector voltage

B : emitter current

C : base current

D : emitter voltage

Q.no 13. Which of the following elements comprise of the passive devices?

A : Resistors, Inductors and Capacitors

B : Vacuum Tubes, SCRs and Diodes

C : Transformers, Inductors and Transistors

D : SCRs, DIACs, and TRIACs

Q.no 14. Number of inputs and outputs in full adder are

A : 2,2

B : 2.3
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C : 3,2

D : 3,3

Q.no 15. The base of an npn transistor is thin and

A : Heavily doped

B : Lightly doped

C : Metallic

D : Doped by a pentavalent material

Q.no 16. Number of diodes used in Center Tap Full Wave Rectifier

A : One

B : Two

C : Four

D : Three

Q.no 17. In P-N-P transistor________

A : emitter area is less than collector area

B : emitter area is greater than collector area

C : base area is slightly greater than emitter area

D : base area is equal to emitter area.

Q.no 18. In a P-N-P transistor, the current carriers are _______

A : acceptor ions

B : donor ions

C : free electrons

D : holes

Q.no 19. Compared to the two winding transformer, in an autotransformer the leakage
reactance and copper losses is

A : less, more

B : less, less

C : more, more

D : more, less

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Q.no 20. Logic states can be _______ or 0

A:0

B:3

C:2

D:1

Q.no 21. The resistivity of a semiconductor _____conductors and insulators

A : More than

B : Lies between

C : Less than

D : Same as

Q.no 22. Emitter of N-P-N transistor is_____

A : Lightly dopped

B : Heavily dopped

C : Moderately dopped

D : Not dopped

Q.no 23. Which of the following is a passive component?

A : Vacumm tube devices

B : Capacitors

C: Semiconductor devices

D : Relays

Q.no 24. DSO stands for ____________________

A : Digital Signal Oscilloscope

B : Digital Supply Oscilloscope

C : Digital Storage Oscilloscope

D : Direct Storage Oscilloscope

Q.no 25. In an N-P-N transistor, _________are the minority carriers.

A : free electrons

B : holes
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C : donor ions

D : acceptor ions

Q.no 26. Which of the following materials can be used to make a light-emitting diode?

A : Silicon

B: Germanium

C: Gallium Arsenide

D : Phosphorescent material

Q.no 27. Avalanche breakdown in a P N junction diode occurs when

A : Potential barrier is reduced to zero.

B : Forward current exceeds certain value.

C : Reverse bias exceeds a certain value.

D : None of these

Q.no 28. A certain non-inverting amplifier has an R1=1KΩ and an Rf=100KΩ. The closed
loop gain is...

A : 100

B : 101

C : 10

D : 1000

Q.no 29. The CB configuration is used to provide which type of gain?

A : voltage

B : current

C : resistance

D : power

Q.no 30. In a transistor if β = 100 and collector current is 10 mA, then IE is _______

A : 10 mA

B : 10.1 mA

C : 11.0 mA

D : 11.1 mA

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Q.no 31. In a P-N junction the positive voltage at which the diode starts to conduct
consequently is called.

A : Cut off voltage

B : Saturation voltage

C : Knee voltage

D : Breakdown voltage

Q.no 32. ____ is used to implement the Booleans functions

A : logical notation

B : Arithmetic logics

C : logic gates

D : Expressions

Q.no 33. Which process of the Electron-hole pair is responsible for emitting of light?

A : Generation

B : Movement

C : Recombination

D : Diffusion

Q.no 34. A Zener diode utilises ………… characteristic for voltage regulation

A : Forward

B : Reverse

C : Both forward and reverse

D : None of the above

Q.no 35. In a function generator, the output waveform of integrator is

A : Sinusoidal

B : Square

C : Triangular

D : Saw-tooth

Q.no 36. If the value of α is 0.9, then value of β is ........

A:9

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B : 0.9

C : 900

D : 90

Q.no 37. Ripple factor for Full Wave Rectifier is

A : 0.45

B : 0.48

C : 0.52

D : 0.82

Q.no 38. Diode is reverse biased , the reverse resistance is

A : Low

B : High

C : Constant

D : None of the above

Q.no 39. 14 pin NOT gate has _____ gates.

A:3

B:4

C:5

D:6

Q.no 40. The operating point is also called the _______

A : cut off point

B : quiescent point

C : saturation point

D : center point

Q.no 41. A ‘literal’ in Boolean Algebra means

A : a variable in its uncomplemented form only

B : a variable ORed with its complement

C : a variable in its complemented form only

D : a variable in its complemented form or uncomplemented form

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Q.no 42. The point of intersection of d.c. and a.c. load lines represents .........

A : Operating point

B : Saturation point

C : Cut off point

D : Center point

Q.no 43. PIN diode is a photosensitive diode because of _______

A : large current flow in p and n region

B : depletion layer increases giving a larger surface area

C : stronger covalent bonds

D : low carrier storage

Q.no 44. Output characteristics of common emitter configuration is plotted between _____

A : IC and VCE at constant IE

B : IC and VCE at constant IB

C : IC and VCB at constant IB

D : IC and VCB at constant IE

Q.no 45. 14 pin 2 input AND gate has _____ gates.

A:3

B:4

C:5

D:6

Q.no 46. The element that has the biggest size in a transistor is _______

A : Collector

B : Base

C : Emitter

D : All the above

Q.no 47. Output of Regulated Power Supply is _____________

A : Sine signal

B : Cosine signal
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C : Sine & Cosine Signal

D : Constant DC Signal

Q.no 48. According to boolean law A + 1 = ___

A:1

B:A

C:0

D : A'

Q.no 49. In a transistor, ____

A : IC = IE + IB

B : IB = IC + IE

C : IE = IC − IB

D : IE = IC + IB

Q.no 50. The output of a logic gate is 1 when all its inputs are at logic 0. The gate is either

A : A NAND or a NOR

B : An AND or an X-OR

C : An OR or a NAND

D : An X-OR or an X-NOR

Q.no 51. The basic difference between square wave and pulse generator is based on its____.

A : Wavform amplitude

B : Frequency Range

C : Cost

D : Duty Cycle

Q.no 52. The tendency of charge carriers to move from a region of heavily concentrated
charges to region of less concentrated charge is known as_______.

A : Depletion current

B : Drain current

C : Diffusion current

D : Saturation current

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Q.no 53. PowerScope is very useful for testing ____________

A : UPS

B : Electric control furnace

C : Transformers

D : All of the above

Q.no 54. 1+1+0

A : S=1,C=0

B : S=1,C=1

C : S=0,C=1

D : S=0,C=0

Q.no 55. For Center tap full Wave Rectifier, Transformer Utilization Factor is given
as_________

A : 0.48

B : 0.287

C : 0.6933

D : 0.81

Q.no 56. The function of shunt resistance in an ammeter is to

A : By pass the current

B : Increase the sensitivity of the ammeter

C : Increase the resistance of ammeter

D : None of the above

Q.no 57. If a 2 mV signal produces a 2 V output, what is the voltage gain?

A : 001

B : 004

C : 100

D : 1000

Q.no 58. The colour of emitted light from LED depends on

A : based on physical dimensions

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B : Number of available carriers

C : Type of semiconductor material used

D : Number of recombinations taking place

Q.no 59. For Bridge Wave Rectifier, Transformer Utilization Factor is given as_________

A : 0.48

B : 0.287

C : 0.6933

D : 0.81

Q.no 60. Magnetic coil galvanometer can be converted into ammeter by connecting ___
resistance in _____ with it.

A : Low, Series

B : High, Series

C : High, Shunt

D : Low, Shunt

Q.no 1. Ammeter is used to measure

A : Amplitude

B : AM signal

C : Current

D : frequency

Q.no 2. In N-P-N transistor______________

A : collector area is greater than emitter area

B : emitter area is greater than collector area

C : base area is greater than emitter area

D : base area is equal to emitter area.

Q.no 3. Gain of common emitter amplifier is determine by the ratio of ac output voltage to
input

A : collector voltage

B : emitter voltage

C : base voltage
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D : drain voltage

Q.no 4. A semiconductor in its purest form is called

A: Insulator

B: Superconductor

C: Intrinsic semiconductor

D: Extrinsic semiconductor

Q.no 5. Multimeter is used to measure the quantities

A : Voltage

B : Current

C : Resistance

D : All of the above mentioned

Q.no 6. What is one important thing transistors do?

A : Amplify weak signals

B : Rectify line voltage

C : Regulate voltage

D : Emit light

Q.no 7. The most commonly used semiconductor is___.

A : Germanium

B : Carbon

C : Sulphur

D : Silicon

Q.no 8. Number of diodes used in Half Wave Rectifier

A : One

B : Two

C : Four

D : Six

Q.no 9. A+B=B+A; AB=BA represent which laws

A : Commutative
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B : Associative

C : Distributive

D : Idempotence

Q.no 10. PMMC stands for_________________

A : Permanent Magnet Moving Coil

B : Permanent Magnet Measuring Coil

C : Push & Move Measuring Coil

D : Permanently Moving Magnet Coil

Q.no 11. A + B represents a ______ gate.

A : AND

B : OR

C : NAND

D : NOR

Q.no 12. For a silicon P-N junction diode, the barrier potential is about

A: 0.7 V

B: 0.8 V

C: 0.9 V

D: 1.0 V

Q.no 13. Number of inputs and outputs in half adder are

A : 2,2

B : 2.3

C : 3,2

D : 3,3

Q.no 14. PIV in Half Wave Rectifier is given as ___________

A : Vm

B : 2Vm

C : 3Vm

D : Vm/π
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Q.no 15. A transistor has how many doped regions?

A:1

B:2

C:3

D:4

Q.no 16. The output voltage in an inverting opamp amplifier is

A : Inphase

B : Out of phase

C : Both Inphase and Out of phase

D : None of the mentioned above

Q.no 17. Rectification is the process of_________

A : DC to AC conversion

B : AC to AC conversion

C : AC to DC conversion

D : DC to DC conversion

Q.no 18. Lower voltage level represents logic 0 and Higher voltage level represents logic 1 ,
then system is called as ________ logic system.

A : Transition

B : Negative

C : Positive

D : Dual

Q.no 19. A.B represents a ______ gate.

A : AND

B : OR

C : NAND

D : NOR

Q.no 20. Rectifier converts ________ signal to _________ signal

A : AC to DC

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B : DC to AC

C : DC to DC

D : AC to AC

Q.no 21. Average load current (ILdc) for Half Wave Rectifier is _______

A : Im/π

B : 2Im/π

C : Im/2π

D : 2Im

Q.no 22. Which of the following materials can be used to produce infrared LED?

A : Si

B : GaAs

C : CdS

D : PbS

Q.no 23. Maximum average load voltage VLdc for Full wave rectifier is given as _____

A : Vm/π

B : 2Vm/π

C : 3Vm/π

D : Vm/2π

Q.no 24. The ____ represents logic inversion or complementing.

A : NOR

B : NAND

C : NOT

D : AND

Q.no 25. Function generator is ____________________ device

A : Output

B : Input

C : standby

D : None of these
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Q.no 26. _______is an electronic instrument which generate different electric signals over
given range of frequencies

A : Multimeter

B : Function Generator

C : CRO

D : Autotransformer

Q.no 27. N-channel MOSFETs are superior to P-channel MOSFETs, because..

A : They have higher input impedance

B : They have high switching time

C : They consume less power

D : Mobility of electrons is greater than that of holes

Q.no 28. For an ideal diode which of the following is true?

A : It allows the passage of current in the forward bias with zero potential drop across the diode

B : It does not allow the flow of current in reverse bias

C : It offers zero resistance in forward bias & infinity resistance in reverse bias.

D : All of the mentioned above

Q.no 29. Input and output signals of common emiiter amplifier are

A : Equal

B : Out of phase

C : In phase

D : None of the above

Q.no 30. An active device is one which ___________

A : Mechanically controls electron flow

B : Electrically controls electron flow

C : Pneumatically controls electron flow

D : Automatically controls electron flow

Q.no 31. For the same excitation voltage and winding currents, the autotransformer gives

A : Less output than two winding transformer

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B : Equal to the output of two winding transformer

C : Half of the output of two winding transformer

D : More than the output of the two winding transformer

Q.no 32. 14 pin TTL IC 7400 is ___________gate IC.

A : EX-OR

B : NOR

C : NAND

D : EX-NOR

Q.no 33. PMMC instrument uses ___________ principle

A : D’Arsonval principle.

B : Einstein

C : Newtons

D : None of these

Q.no 34. Which of the following is true about a PIN diode?

A : it’s photosensitive in reverse bias

B : it offers low resistance and low capacitance

C : it has a decreased reversed breakdown voltage

D : carrier storage is low

Q.no 35. 14 pin 2 input NOR gate has _____ gates.

A:3

B:4

C:5

D:6

Q.no 36. Special kind of CRO which can store the waveforms in digital form is
called______________

A : ROM

B : RAM

C : DSO

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D : Autotransformer

Q.no 37. To operate in active region, transistor's base-emitter junction must be forward
biased and ________junction is reverse bias.

A : collector-emitter

B : base-collector

C : base-emitter

D : collector-base

Q.no 38. 14 pin TTL IC 74266 is ___________gate IC.

A : EX-OR

B : NOR

C : NAND

D : EX-NOR

Q.no 39. A flip-flop can be made using

A : basic gates such as AND, OR and NOT

B : NAND gates

C : NOR gates

D : both (b) & (c)

Q.no 40. Active devices can also be used as_________

A : Amplifiers

B : Choppers

C : Converters

D : Inverters

Q.no 41. Transistor biasing represents______ conditions.

A : a.c.

B : d.c.

C : both a.c. and d.c.

D : neither a.c. nor d.c.

Q.no 42. The number of depletion layers in a transistor is __________

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A : Four

B : Three

C : One

D : Two

Q.no 43. What is the main advantage of using a digital storage oscilloscope?

A : Uses digital storage

B : Uses analog storage

C : Uses mixed mode storage

D : Uses disc storage

Q.no 44. Which of the following Boolean rules is correct?

A:A+0=0

B:A+1=1

C:A+A=1

D:A+B=1

Q.no 45. For Half Wave Rectifier, Transformer Utilization Factor is given as_________

A : 0.48

B : 0.287

C : 0.6933

D : 0.81

Q.no 46. When forward biased, LED emits light because of

A : Recombination of carriers

B : Light generated in breaking the covalent bonds

C : Light produced by collisions

D : All of the above reasons

Q.no 47. The maximum reverse voltage that can be applied to an ordinary semiconductor
diode without irreverslible damage is called

A: Cut-off voltage

B : Avalanche breakdown voltage

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C : Peak inverse voltage

D: Zener voltage

Q.no 48. In an unclocked R-S flip-flop made of NOR gates, the forbidden input condition is

A : R = 0, S = 0

B : R = 1, S = 0

C : R = 0, S = 1

D : R = 1, S = 1

Q.no 49. Voltage Regulation is defined as

A : Constant Current

B : Constant Volatge

C : Constant frequency

D : Constant resistance

Q.no 50. A current ratio of IC/IB is usually greater than one and is called…..

A : beta

B : alpha

C : omega

D : theta

Q.no 51. A Zener voltage regulator needs to provide a constant voltage in spite of the fact that
there may be

A : Change in the load current drawn from the terminals of the regulator

B : Change of the DC power supply that feeds the regulator circuit

C : Both A & B

D : None of the mentioned above

Q.no 52. Magnetic coil Galvanometer can be converted into voltmeter by connecting ____
resistance in ____ with it.

A : Low, Series

B : High, Series

C : High, Shunt

D : Low, Shunt
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Q.no 53. Which statement is true for N-P-N transistor

A : Depletion region across B-E and C-B junction is same

B : Depletion region across B-E junction is larger than C-B junction

C : Depletion region across C-B junction is larger than B-E junction.

D : There is no depletion region in N-P-N transistor

Q.no 54. Maximum rectification efficiency for Half Wave Rectifier is ________

A : 0.4

B : 0.6

C : 0.45

D : 0.48

Q.no 55. An Ideal voltmeter has ____ equivalent resistance & ideal ammeter has ____
equivalent resistance

A : Unity, Unity

B : Zero , Infinite

C : Infinite , Zero

D : Zero , Zero

Q.no 56. C-E configuration is used as amplifier because of its…..

A : voltage gain

B : current gain

C : resistance gain

D : power gain

Q.no 57. Drift current is due to ___________

A : Applied electric field over a given distance

B : Random motion of electrons

C : Random motion of holes

D : Recombination of holes and electrons

Q.no 58. Standard two forms of boolean expression are __________

A : SOS and SOP

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B : POS and SOP

C : SOS and POP

D : POS and POP

Q.no 59. Output stage of an op-amp is usually a

A : Complementary emitter follower

B : Transformer coupled class B amplifier

C : Class A power amplifier.

D : Class B amplifier

Q.no 60. The number of rows in the truth table of a 4- input gate is,

A:4

B:8

C : 12

D : 16

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Seat No -
Total number of questions : 60
1000531_T1 BASIC ELECTRONICS ENGINEERING
Time : 1hr
Max Marks : 50
N.B

1) All questions are Multiple Choice Questions having single correct option.

2) Attempt any 50 questions out of 60.

3) Use of calculator is allowed.

4) Each question carries 1 Mark.

5) Specially abled students are allowed 20 minutes extra for examination.

6) Do not use pencils to darken answer.

7) Use only black/blue ball point pen to darken the appropriate circle.

8) No change will be allowed once the answer is marked on OMR Sheet.

9) Rough work shall not be done on OMR sheet or on question paper.

10) Darken ONLY ONE CIRCLE for each answer.

Q.no 1. PIV in Half Wave Rectifier is given as ___________

A : Vm

B : 2Vm

C : 3Vm

D : Vm/π

Q.no 2. Lower voltage level represents logic 0 and Higher voltage level represents logic 1 ,
then system is called as ________ logic system.

A : Transition

B : Negative

C : Positive

D : Dual

Q.no 3. CRO stands for ____________

A : Cathode Ray Oscilloscope

B : Carbon Ray Oscilloscope

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C : Cathode Rod Oscilloscope

D : Cathode Rod Oxymeter

Q.no 4. Which of the following materials can be used to produce infrared LED?

A : Si

B : GaAs

C : CdS

D : PbS

Q.no 5. The most commonly used semiconductor is___.

A : Germanium

B : Carbon

C : Sulphur

D : Silicon

Q.no 6. Base of N-P-N transistor is_____

A : Lightly dopped

B : Heavily dopped

C : Moderately dopped

D : Not dopped

Q.no 7. Multimeter is used to measure the quantities

A : Voltage

B : Current

C : Resistance

D : All of the above mentioned

Q.no 8. Emitter of N-P-N transistor is_____

A : Lightly dopped

B : Heavily dopped

C : Moderately dopped

D : Not dopped

Q.no 9. A flip-flip can store

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A : one bit of data

B : two bits of data

C : three bits of data

D : any number of bits of data

Q.no 10. In a transistor, the base current is about ________ of emitter current.

A : 0.25

B : 0.2

C : 0.35

D : 05

Q.no 11. For a silicon P-N junction diode, the barrier potential is about

A: 0.7 V

B: 0.8 V

C: 0.9 V

D: 1.0 V

Q.no 12. A+B=B+A; AB=BA represent which laws

A : Commutative

B : Associative

C : Distributive

D : Idempotence

Q.no 13. A.B represents a ______ gate.

A : AND

B : OR

C : NAND

D : NOR

Q.no 14. Ammeter is connected in ______________ with load in circuit

A : Series

B : Parallel

C : Both A & B
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D : None of the above

Q.no 15. Full form of SIPO is

A : Serial in Parallel out

B : Serial in Serial out

C : Parallel in Serial out

D : Serial in Peripheral out

Q.no 16. What is one important thing transistors do?

A : Amplify weak signals

B : Rectify line voltage

C : Regulate voltage

D : Emit light

Q.no 17. P-type semiconductor results when

A : A pentavalent impurity is added to an intrinsic semiconductor

B : A trivalent impurity is added to an intrinsic semiconductor

C : Either a pentavalent or trivalent impurity is added to an intrinsic semiconductor

D : None of the above

Q.no 18. Collector of P-N-P transistor is_____

A : Lightly dopped

B : Thin and Heavily dopped

C : Area large and Moderately dopped

D : Not dopped

Q.no 19. N-type semiconductor results when

A : A pentavalent impurity is added to an intrinsic semiconductor

B : A trivalent impurity is added to an intrinsic semiconductor

C : Either a pentavalent or trivalent impurity is added to an intrinsic semiconductor

D: None of the above

Q.no 20. Voltmeter is used to measure ______

A : Voltage
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B : AM signal

C : Current

D : frequency

Q.no 21. A flip-flop has two outputs which are

A : always zero

B : always one

C : always complementary

D : all of the above

Q.no 22. A semiconductor in its purest form is called

A: Insulator

B: Superconductor

C: Intrinsic semiconductor

D: Extrinsic semiconductor

Q.no 23. Compared to the two winding transformer, in an autotransformer the leakage
reactance and copper losses is

A : less, more

B : less, less

C : more, more

D : more, less

Q.no 24. In a P-N-P transistor, the current carriers are _______

A : acceptor ions

B : donor ions

C : free electrons

D : holes

Q.no 25. The output of logic gate OR is zero when_____

A : any one input is logic 1

B : two inputs are logic 1

C : all inputs are logic 0

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D : any one input is logic 0

Q.no 26. To operate in active region, transistor's base-emitter junction must be forward
biased and ________junction is reverse bias.

A : collector-emitter

B : base-collector

C : base-emitter

D : collector-base

Q.no 27. Function Generator produces __________waves

A : Sine

B : Sawtooth

C : Square

D : All of these mentioned

Q.no 28. The output of a logic gate is 1 when all its inputs are at logic 0. The gate is either

A : A NAND or a NOR

B : An AND or an X-OR

C : An OR or a NAND

D : An X-OR or an X-NOR

Q.no 29. For Half Wave Rectifier, Transformer Utilization Factor is given as_________

A : 0.48

B : 0.287

C : 0.6933

D : 0.81

Q.no 30. Output characteristics of common emitter configuration is plotted between _____

A : IC and VCE at constant IE

B : IC and VCE at constant IB

C : IC and VCB at constant IB

D : IC and VCB at constant IE

Q.no 31. A differential amplifier, amplifies

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A : and mathematically differentiates the average of the voltages on the two input lines

B : and differentiates the input waveform on one line when the other line is grounded

C : the difference of voltages between the two input lines

D : and differentiates the sum of the two input waveforms

Q.no 32. 14 pin 2 input AND gate has _____ gates.

A:3

B:4

C:5

D:6

Q.no 33. In a transistor if β = 100 and collector current is 10 mA, then IE is _______

A : 10 mA

B : 10.1 mA

C : 11.0 mA

D : 11.1 mA

Q.no 34. PMMC instrument uses ___________ principle

A : D’Arsonval principle.

B : Einstein

C : Newtons

D : None of these

Q.no 35. The point of intersection of d.c. and a.c. load lines represents .........

A : Operating point

B : Saturation point

C : Cut off point

D : Center point

Q.no 36. The CB configuration is used to provide which type of gain?

A : voltage

B : current

C : resistance
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D : power

Q.no 37. According to boolean law A + 1 = ___

A:1

B:A

C:0

D : A'

Q.no 38. Avalanche breakdown in a P N junction diode occurs when

A : Potential barrier is reduced to zero.

B : Forward current exceeds certain value.

C : Reverse bias exceeds a certain value.

D : None of these

Q.no 39. Digital multimeter is used for _________

A : measuring a.c. and d.c. current, voltage and resistance

B : measuring only a.c. current and voltage

C : measuring only d.c. current and resistance

D : measuring only a.c. voltage and resistance

Q.no 40. Output of Regulated Power Supply is _____________

A : Sine signal

B : Cosine signal

C : Sine & Cosine Signal

D : Constant DC Signal

Q.no 41. Which is the higher gain provided by a C-E configuration?

A : Power

B : Voltage

C : Current

D : Resistance

Q.no 42. _____ gives all possible combinations between input and output of logic gate.

A : Truth Table
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B : Flow Table

C : Boolean Expression

D : Excitation table

Q.no 43. 14 pin NOT gate has _____ gates.

A:3

B:4

C:5

D:6

Q.no 44. For an ideal diode which of the following is true?

A : It allows the passage of current in the forward bias with zero potential drop across the diode

B : It does not allow the flow of current in reverse bias

C : It offers zero resistance in forward bias & infinity resistance in reverse bias.

D : All of the mentioned above

Q.no 45. For the same excitation voltage and winding currents, the autotransformer gives

A : Less output than two winding transformer

B : Equal to the output of two winding transformer

C : Half of the output of two winding transformer

D : More than the output of the two winding transformer

Q.no 46. Input and output signals of common emiiter amplifier are

A : Equal

B : Out of phase

C : In phase

D : None of the above

Q.no 47. An active device is one which ___________

A : Mechanically controls electron flow

B : Electrically controls electron flow

C : Pneumatically controls electron flow

D : Automatically controls electron flow

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Q.no 48. In Volt Ampere characteristics of diode the current increases with voltage ___.

A : Exponentially

B : Equally

C : Sinusoidal

D : Unequally

Q.no 49. The element that has the biggest size in a transistor is _______

A : Collector

B : Base

C : Emitter

D : All the above

Q.no 50. ____ is used to implement the Booleans functions

A : logical notation

B : Arithmetic logics

C : logic gates

D : Expressions

Q.no 51. The fan-out of a MOS-logic gate is higher than that of TTL gates because of its

A : low input impedance

B : low output impedance

C : high input impedance

D : high output impedance

Q.no 52. 1+1+0

A : S=1,C=0

B : S=1,C=1

C : S=0,C=1

D : S=0,C=0

Q.no 53. C-E configuration is used as amplifier because of its…..

A : voltage gain

B : current gain
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C : resistance gain

D : power gain

Q.no 54. Transistor biasing is done to keep_________in the circuit.

A : proper direct current

B : proper alternating current

C : the base current small

D : collector current small

Q.no 55. The function of shunt resistance in an ammeter is to

A : By pass the current

B : Increase the sensitivity of the ammeter

C : Increase the resistance of ammeter

D : None of the above

Q.no 56. Maximum rectification efficiency for Center Tap Full Wave Rectifier is ________

A : 0.28

B : 0.95

C : 0.812

D : 0.4

Q.no 57. In a transistor amplifier circuit, VCE = VCB + ___

A : VBE

B : 2 VBE

C : 1.5 VBE

D : 3 VBE

Q.no 58. What makes up the total current in a semi-conductor?

A : Only diffusion current

B : Only drift current

C : drift+diffusion current

D : None of the above

Q.no 59. If a 2 mV signal produces a 2 V output, what is the voltage gain?

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A : 001

B : 004

C : 100

D : 1000

Q.no 60. A Zener voltage regulator needs to provide a constant voltage in spite of the fact that
there may be

A : Change in the load current drawn from the terminals of the regulator

B : Change of the DC power supply that feeds the regulator circuit

C : Both A & B

D : None of the mentioned above

Q.no 1. PMMC stands for_________________

A : Permanent Magnet Moving Coil

B : Permanent Magnet Measuring Coil

C : Push & Move Measuring Coil

D : Permanently Moving Magnet Coil

Q.no 2. PIV in Center Tap Full Wave Rectifier is

A : Vm

B : 2Vm

C : 3Vm

D : Vm/π

Q.no 3. PIV in Bridge Rectifier is given as ____________

A : Vm

B : 2Vm

C : 3Vm

D : Vm/π

Q.no 4. Number of inputs and outputs in full adder are

A : 2,2

B : 2.3

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C : 3,2

D : 3,3

Q.no 5. When a silicon diode is forward biased, what is VBE for a C-E configuration?

A : voltage-divider bias

B : 0.4 V

C : 0.7 V

D : emitter voltage

Q.no 6. Rectification is the process of_________

A : DC to AC conversion

B : AC to AC conversion

C : AC to DC conversion

D : DC to DC conversion

Q.no 7. A doped semiconductor is also known as

A : Intrinsic semiconductor

B : Extrinsic semiconductor

C : Diffused semiconductor

D : None of the above

Q.no 8. Number of diodes used in Center Tap Full Wave Rectifier

A : One

B : Two

C : Four

D : Three

Q.no 9. Rectifier converts ________ signal to _________ signal

A : AC to DC

B : DC to AC

C : DC to DC

D : AC to AC

Q.no 10. Inversion of single bit input to a single bit output using
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A : NOT gate

B : NOR gate

C : AND gate

D : NAND gate

Q.no 11. In an N-P-N transistor, _________are the minority carriers.

A : free electrons

B : holes

C : donor ions

D : acceptor ions

Q.no 12. Voltmeter is connected in ____________ with load in circuit

A : Series

B : Parallel

C : Both A & B

D : None of the above

Q.no 13. A transistor has _____________

A : one pn junction

B : two pn junctions

C : three pn junctions

D : four pn junctions

Q.no 14. Which of the following is a passive component?

A : Vacumm tube devices

B : Capacitors

C: Semiconductor devices

D : Relays

Q.no 15. Number of diodes used in Half Wave Rectifier

A : One

B : Two

C : Four
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D : Six

Q.no 16. Gain of common emitter amplifier is determine by the ratio of ac output voltage to
input

A : collector voltage

B : emitter voltage

C : base voltage

D : drain voltage

Q.no 17. In N-P-N transistor______________

A : collector area is greater than emitter area

B : emitter area is greater than collector area

C : base area is greater than emitter area

D : base area is equal to emitter area.

Q.no 18. Ammeter is used to measure

A : Amplitude

B : AM signal

C : Current

D : frequency

Q.no 19. The ____ represents logic inversion or complementing.

A : NOR

B : NAND

C : NOT

D : AND

Q.no 20. The output voltage in an inverting opamp amplifier is

A : Inphase

B : Out of phase

C : Both Inphase and Out of phase

D : None of the mentioned above

Q.no 21. A transistor has how many doped regions?

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A:1

B:2

C:3

D:4

Q.no 22. Number of diodes used in Bridge type Full Wave Rectifier

A : One

B : Two

C : Four

D : Three

Q.no 23. Output of common emitter amplifier is at

A : collector

B : emitter

C : base

D : drain

Q.no 24. The base of an npn transistor is thin and

A : Heavily doped

B : Lightly doped

C : Metallic

D : Doped by a pentavalent material

Q.no 25. In a transistor, collector current is controlled by

A : collector voltage

B : emitter current

C : base current

D : emitter voltage

Q.no 26. PIN diode is a photosensitive diode because of _______

A : large current flow in p and n region

B : depletion layer increases giving a larger surface area

C : stronger covalent bonds

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D : low carrier storage

Q.no 27. 14 pin TTL IC 74266 is ___________gate IC.

A : EX-OR

B : NOR

C : NAND

D : EX-NOR

Q.no 28. Which of the following is true about a PIN diode?

A : it’s photosensitive in reverse bias

B : it offers low resistance and low capacitance

C : it has a decreased reversed breakdown voltage

D : carrier storage is low

Q.no 29. Voltage Regulation is defined as

A : Constant Current

B : Constant Volatge

C : Constant frequency

D : Constant resistance

Q.no 30. Diode is reverse biased , the reverse resistance is

A : Low

B : High

C : Constant

D : None of the above

Q.no 31. Which of the following materials can be used to make a light-emitting diode?

A : Silicon

B: Germanium

C: Gallium Arsenide

D : Phosphorescent material

Q.no 32. The maximum reverse voltage that can be applied to an ordinary semiconductor
diode without irreverslible damage is called

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A: Cut-off voltage

B : Avalanche breakdown voltage

C : Peak inverse voltage

D: Zener voltage

Q.no 33. The number of depletion layers in a transistor is __________

A : Four

B : Three

C : One

D : Two

Q.no 34. The operating point is also called the _______

A : cut off point

B : quiescent point

C : saturation point

D : center point

Q.no 35. Diode is forward biased , the forward resistance is

A : Low

B : High

C : Constant

D : None of the above

Q.no 36. Active devices can also be used as_________

A : Amplifiers

B : Choppers

C : Converters

D : Inverters

Q.no 37. In a P-N junction the positive voltage at which the diode starts to conduct
consequently is called.

A : Cut off voltage

B : Saturation voltage

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C : Knee voltage

D : Breakdown voltage

Q.no 38. What is the main advantage of using a digital storage oscilloscope?

A : Uses digital storage

B : Uses analog storage

C : Uses mixed mode storage

D : Uses disc storage

Q.no 39. Ripple factor for Full Wave Rectifier is

A : 0.45

B : 0.48

C : 0.52

D : 0.82

Q.no 40. A flip-flop can be made using

A : basic gates such as AND, OR and NOT

B : NAND gates

C : NOR gates

D : both (b) & (c)

Q.no 41. In an unclocked R-S flip-flop made of NOR gates, the forbidden input condition is

A : R = 0, S = 0

B : R = 1, S = 0

C : R = 0, S = 1

D : R = 1, S = 1

Q.no 42. Which of the following Boolean rules is correct?

A:A+0=0

B:A+1=1

C:A+A=1

D:A+B=1

Q.no 43. 14 pin TTL IC 7400 is ___________gate IC.

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A : EX-OR

B : NOR

C : NAND

D : EX-NOR

Q.no 44. 14 pin 2 input OR gate has _____ gates.

A:3

B:4

C:5

D:6

Q.no 45. In a transistor, ____

A : IC = IE + IB

B : IB = IC + IE

C : IE = IC − IB

D : IE = IC + IB

Q.no 46. When forward biased, LED emits light because of

A : Recombination of carriers

B : Light generated in breaking the covalent bonds

C : Light produced by collisions

D : All of the above reasons

Q.no 47. 14 pin 2 input NOR gate has _____ gates.

A:3

B:4

C:5

D:6

Q.no 48. A Zener diode utilises ………… characteristic for voltage regulation

A : Forward

B : Reverse

C : Both forward and reverse

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D : None of the above

Q.no 49. A current ratio of IC/IB is usually greater than one and is called…..

A : beta

B : alpha

C : omega

D : theta

Q.no 50. Which process of the Electron-hole pair is responsible for emitting of light?

A : Generation

B : Movement

C : Recombination

D : Diffusion

Q.no 51. Maximum rectification efficiency for Bridge Rectifier is ________

A : 0.4

B : 0.28

C : 0.48

D : 0.812

Q.no 52. Output stage of an op-amp is usually a

A : Complementary emitter follower

B : Transformer coupled class B amplifier

C : Class A power amplifier.

D : Class B amplifier

Q.no 53. In a C-E configuration, an emitter resistor is used for___

A : ac signal bypass

B : Bias stabilization

C : collector bias

D : Emitter bias

Q.no 54. The ‘slew rate’ of an operational amplifier indicates

A : how fast its output current can change

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B : how fast its output impedance can change

C : how fast its output power can change

D : how fast its output voltage can change

Q.no 55. A simple diode rectifier has ‘ripples’ in the output wave which makes it unsuitable as
a DC source. To overcome this one can use

A : A capacitor in series with a the load resistance

B : A capacitor in parallel to the load resistance

C : Both of the mentioned situations will work

D : None of the mentioned situations will work

Q.no 56. 1+1+1

A : S=1,C=0

B : S=1,C=1

C : S=0,C=1

D : S=0,C=0

Q.no 57. Which statement is true for N-P-N transistor

A : Depletion region across B-E and C-B junction is same

B : Depletion region across B-E junction is larger than C-B junction

C : Depletion region across C-B junction is larger than B-E junction.

D : There is no depletion region in N-P-N transistor

Q.no 58. Standard two forms of boolean expression are __________

A : SOS and SOP

B : POS and SOP

C : SOS and POP

D : POS and POP

Q.no 59. A register is able to hold

A : Data

B : Word

C : Nibble

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D : Both Data & Word

Q.no 60. The tendency of charge carriers to move from a region of heavily concentrated
charges to region of less concentrated charge is known as_______.

A : Depletion current

B : Drain current

C : Diffusion current

D : Saturation current

Q.no 1. Average load current (ILdc) for Half Wave Rectifier is _______

A : Im/π

B : 2Im/π

C : Im/2π

D : 2Im

Q.no 2. A+B=B+A; AB=BA represent which laws

A : Commutative

B : Associative

C : Distributive

D : Idempotence

Q.no 3. The logic gate which detects equality of two bits is

A : EX-OR

B : EX-NOR

C : NOR

D : NAND

Q.no 4. Lower voltage level represents logic 0 and Higher voltage level represents logic 1 ,
then system is called as ________ logic system.

A : Transition

B : Negative

C : Positive

D : Dual

Q.no 5. Which of the following elements comprise of the passive devices?

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A : Resistors, Inductors and Capacitors

B : Vacuum Tubes, SCRs and Diodes

C : Transformers, Inductors and Transistors

D : SCRs, DIACs, and TRIACs

Q.no 6. P-type semiconductor results when

A : A pentavalent impurity is added to an intrinsic semiconductor

B : A trivalent impurity is added to an intrinsic semiconductor

C : Either a pentavalent or trivalent impurity is added to an intrinsic semiconductor

D : None of the above

Q.no 7. The most commonly used semiconductor is___.

A : Germanium

B : Carbon

C : Sulphur

D : Silicon

Q.no 8. DSO is an ______________ device

A : Output

B : Input

C : Standby

D : None of these

Q.no 9. Logic states can be _______ or 0

A:0

B:3

C:2

D:1

Q.no 10. Maximum average load voltage VLdc for Full wave rectifier is given as _____

A : Vm/π

B : 2Vm/π

C : 3Vm/π
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D : Vm/2π

Q.no 11. Multimeter is used to measure the quantities

A : Voltage

B : Current

C : Resistance

D : All of the above mentioned

Q.no 12. Emitter of N-P-N transistor is_____

A : Lightly dopped

B : Heavily dopped

C : Moderately dopped

D : Not dopped

Q.no 13. In a transistor, the base current is about ________ of emitter current.

A : 0.25

B : 0.2

C : 0.35

D : 05

Q.no 14. DSO stands for ____________________

A : Digital Signal Oscilloscope

B : Digital Supply Oscilloscope

C : Digital Storage Oscilloscope

D : Direct Storage Oscilloscope

Q.no 15. CRO stands for ____________

A : Cathode Ray Oscilloscope

B : Carbon Ray Oscilloscope

C : Cathode Rod Oscilloscope

D : Cathode Rod Oxymeter

Q.no 16. In a BJT

A : The base region is sandwiched between emitter and collector

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B : The collector is sandwiched between base and emitter

C : The emitter region is sandwiched between base and collector

D : The drain region is sandwiched between emitter and collector

Q.no 17. In P-N-P transistor________

A : emitter area is less than collector area

B : emitter area is greater than collector area

C : base area is slightly greater than emitter area

D : base area is equal to emitter area.

Q.no 18. PIV in Half Wave Rectifier is given as ___________

A : Vm

B : 2Vm

C : 3Vm

D : Vm/π

Q.no 19. A semiconductor in its purest form is called

A: Insulator

B: Superconductor

C: Intrinsic semiconductor

D: Extrinsic semiconductor

Q.no 20. A flip-flop has two outputs which are

A : always zero

B : always one

C : always complementary

D : all of the above

Q.no 21. Number of inputs and outputs in half adder are

A : 2,2

B : 2.3

C : 3,2

D : 3,3
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Q.no 22. Base of N-P-N transistor is_____

A : Lightly dopped

B : Heavily dopped

C : Moderately dopped

D : Not dopped

Q.no 23. Which of the following materials can be used to produce infrared LED?

A : Si

B : GaAs

C : CdS

D : PbS

Q.no 24. The forward region of a semiconductor diode characteristic curve is where diode
appears as

A : Inductor

B : An ON switch

C : An OFF switch

D : Capacitor

Q.no 25. N-type semiconductor results when

A : A pentavalent impurity is added to an intrinsic semiconductor

B : A trivalent impurity is added to an intrinsic semiconductor

C : Either a pentavalent or trivalent impurity is added to an intrinsic semiconductor

D: None of the above

Q.no 26. Amplifiers using BJT, operate in ...... region

A : Inverted

B : Active

C : Cut off

D : Saturation

Q.no 27. For the same excitation voltage and winding currents, the autotransformer gives

A : Less output than two winding transformer

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B : Equal to the output of two winding transformer

C : Half of the output of two winding transformer

D : More than the output of the two winding transformer

Q.no 28. Ripple factor for Half Wave Rectifier is

A : 1.21

B : 1.12

C : 0.48

D : 0.63

Q.no 29. _____ gives all possible combinations between input and output of logic gate.

A : Truth Table

B : Flow Table

C : Boolean Expression

D : Excitation table

Q.no 30. The CB configuration is used to provide which type of gain?

A : voltage

B : current

C : resistance

D : power

Q.no 31. A certain non-inverting amplifier has an R1=1KΩ and an Rf=100KΩ. The closed
loop gain is...

A : 100

B : 101

C : 10

D : 1000

Q.no 32. For Half Wave Rectifier, Transformer Utilization Factor is given as_________

A : 0.48

B : 0.287

C : 0.6933

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D : 0.81

Q.no 33. Output characteristics of common emitter configuration is plotted between _____

A : IC and VCE at constant IE

B : IC and VCE at constant IB

C : IC and VCB at constant IB

D : IC and VCB at constant IE

Q.no 34. The element that has the biggest size in a transistor is _______

A : Collector

B : Base

C : Emitter

D : All the above

Q.no 35. 14 pin NOT gate has _____ gates.

A:3

B:4

C:5

D:6

Q.no 36. The point of intersection of d.c. and a.c. load lines represents .........

A : Operating point

B : Saturation point

C : Cut off point

D : Center point

Q.no 37. ____ is used to implement the Booleans functions

A : logical notation

B : Arithmetic logics

C : logic gates

D : Expressions

Q.no 38. Transistor biasing represents______ conditions.

A : a.c.
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B : d.c.

C : both a.c. and d.c.

D : neither a.c. nor d.c.

Q.no 39. A current ratio of IC/IE is usually less than one and is called as

A : beta

B : theta

C : alpha

D : omega

Q.no 40. For an ideal diode which of the following is true?

A : It allows the passage of current in the forward bias with zero potential drop across the diode

B : It does not allow the flow of current in reverse bias

C : It offers zero resistance in forward bias & infinity resistance in reverse bias.

D : All of the mentioned above

Q.no 41. If the value of α is 0.9, then value of β is ........

A:9

B : 0.9

C : 900

D : 90

Q.no 42. For Bridge Rectifier ripple factor is __________

A : 0.4

B : 0.42

C : 0.46

D : 0.48

Q.no 43. A ‘literal’ in Boolean Algebra means

A : a variable in its uncomplemented form only

B : a variable ORed with its complement

C : a variable in its complemented form only

D : a variable in its complemented form or uncomplemented form

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Q.no 44. In a function generator, the output waveform of integrator is

A : Sinusoidal

B : Square

C : Triangular

D : Saw-tooth

Q.no 45. _______is an electronic instrument which generate different electric signals over
given range of frequencies

A : Multimeter

B : Function Generator

C : CRO

D : Autotransformer

Q.no 46. To operate in active region, transistor's base-emitter junction must be forward
biased and ________junction is reverse bias.

A : collector-emitter

B : base-collector

C : base-emitter

D : collector-base

Q.no 47. Which is the higher gain provided by a C-E configuration?

A : Power

B : Voltage

C : Current

D : Resistance

Q.no 48. Digital multimeter is used for _________

A : measuring a.c. and d.c. current, voltage and resistance

B : measuring only a.c. current and voltage

C : measuring only d.c. current and resistance

D : measuring only a.c. voltage and resistance

Q.no 49. In an ammeter the shunt resistance usually ..... meter resistance

A : Equal to
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B : Less than

C : Greater than

D : Of any value

Q.no 50. According to boolean law A + 1 = ___

A:1

B:A

C:0

D : A'

Q.no 51. The basic difference between square wave and pulse generator is based on its____.

A : Wavform amplitude

B : Frequency Range

C : Cost

D : Duty Cycle

Q.no 52. The arrow in the symbol of a transistor indicates the direction of __________

A : Current in the base

B : Current in the collector

C : Current in the emitter

D : donor ion current

Q.no 53. PowerScope is very useful for testing ____________

A : UPS

B : Electric control furnace

C : Transformers

D : All of the above

Q.no 54. Maximum rectification efficiency for Center Tap Full Wave Rectifier is ________

A : 0.28

B : 0.95

C : 0.812

D : 0.4
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Q.no 55. The colour of emitted light from LED depends on

A : based on physical dimensions

B : Number of available carriers

C : Type of semiconductor material used

D : Number of recombinations taking place

Q.no 56. If a transistor operates at the middle of the dc load line, a decrease in the current
gain will move the Q point

A : down

B : off the load line

C : up

D : no where

Q.no 57. If biasing is not done in an amplifier circuit, it results in ________

A : decrease in base current

B : unfaithful amplification

C : excessive collector bias

D : No impact

Q.no 58. Maximum rectification efficiency for Half Wave Rectifier is ________

A : 0.4

B : 0.6

C : 0.45

D : 0.48

Q.no 59. Autotransformer is special type of transformer with

A : Common for Primary and Secondary winding

B : Primary winding more than Secondary winding

C : Secondary winding more than Primary windings

D : No winding

Q.no 60. Magnetic coil galvanometer can be converted into ammeter by connecting ___
resistance in _____ with it.

A : Low, Series
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B : High, Series

C : High, Shunt

D : Low, Shunt

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