Adama Science and Technology University

Demo Exit Exam 2024

Result Paper
test 2024-02-21 Electrical Engineering ...
user - test 60. - UGR/19752/12 [2024-02-21 11:35:55]

start time: 2024-02-21 11:35:55 +5 min

end time: 2024-02-21 12:32:27
test time: 00:56:32
points: 39.000 / 100.000 (39%)
correct: 39 / 100 (39%)
comment:

1. [0.000] (IP:281470865277619 | 11:35:55 | 11:36:50 | 00:55 | 55.457)

Given the transistor’s V-I characteristics curve in the following figure, which alternative is
not correct about the transistor characteristics from the information given in the graph?

1. x The transistor is common base configuration with output characteristics curve

2. ® The transistor is common Emitter configuration with input characteristics curve
3. As Collector-Base voltage increases, Emitter current increases slightly
4. The transistor is common base configuration with input characteristics curve

2. [1.000] (IP:281470865277619 | 11:36:50 | 11:37:07 | 00:17 | 15.728)

What is an algorithm in programming?
1. A software tool used for code compilation
2. Programming language used for web development
3. A data structure that holds a collection of elements
 4. x ® A step-by-step procedure or set of instructions to solve a problem

3. [1.000] (IP:281470865277619 | 11:37:07 | 11:37:38 | 00:31 | 31.058)

Stability of a system implies that:
1. x ® All
2. Small changes in the system input does not result in large change in system output
3. Small changes in the system parameters does not result in large change in system
output
4. Small changes in the initial conditions does not result in large change in system
output

4. [0.000] (IP:281470865277619 | 11:37:38 | 11:40:11 | 02:33 | 35.487)

For the circuit shown, if i = sin1000t , the instantaneous value of the Thevenin’s equivalent
voltage (in Volts) across the terminal a-b at time t = 5 ms is ______

1. x 11.98
2. -20.25
3. ® -11.98
4. 20.25

5. [1.000] (IP:281470865277619 | 11:38:42 | 11:38:52 | 00:10 | 9.587)

Which of the following is not a signal?
1. Pressure
2. Voltage
3. Torque
4. x ® Blood

6. [0.000] (IP:281470865277619 | 11:38:52 | 11:39:09 | 00:17 | 17.1)

A system is described by y(t) = cosx(t) + 2 sinx(t-1). it is
1. Memoryless
2. x Causal
3. ® With memory
4. Noncausal

7. [0.000] (IP:281470865277619 | 11:39:09 | 11:40:44 | 01:35 | 26.322)

How must the output of a gate in a TTL digital circuit act when it is HIGH?
1. ® Acts as a current source
2. Acts as a current sink
3. x Acts as a voltage sink
 4. Acts as a voltage source

8. [0.000] (IP:281470865277619 | 11:40:44 | 11:41:09 | 00:25 | 24.694)

In a balanced ∆- Y circuit, Vab = 240 < 15° and Z Y = 12+ j15 then, the line currents of load
are given by.
1. 4.16 < −66.34° A, 4.16 < −186.34°A, 4.16 < −53.66° A
2. ® 7.21 < −66.34° A, 7.21 < −186.34°A, 7.21 < 53.66° A
3. x 7.21 < 66.34° A, 7.21 < −186.34°A, 7.21 < −53.66° A
4. 12.48 < −66.34° A, 12.48 < −186.34°A, 12.48 < 53.66° A

9. [0.000] (IP:281470865277619 | 11:41:09 | 11:41:31 | 00:22 | 21.592)

While designing a constant-k low pass filter (T-section) shown below, what would be the value
of capacitor if L/2 = 20mH, R0 = 500 Ω and fc = 5 kHz?

1. ® 0.1273 µF
2. 0.0635 µF
3. x 0.20 µF
4. 0.10 µF

10. [0.000] (IP:281470865277619 | 11:41:31 | 11:42:28 | 00:57 | 56.947)

1. 15
2. 32
3. ® 8
4. x 18
11. [0.000] (IP:281470865277619 | 11:42:28 | 11:43:30 | 01:02 | 62.444)
For the device shown here, let all D inputs be LOW, both S inputs be HIGH, and the input be
LOW. What is the status of the Y output?

1. x LOW
2. ® HIGH
3. Cannot be determined
4. Don't Care

12. [1.000] (IP:281470865277619 | 11:43:30 | 11:44:53 | 01:23 | 82.053)

What does pseudocode offer during program design compared to writing actual code?
1. x ® A higher level of abstraction and readability
2. Faster execution and testing of the program
3. Direct interaction with the computer hardware
4. More precise syntax and error checking

13. [1.000] (IP:281470865277619 | 11:44:53 | 11:45:17 | 00:24 | 23.985)

In a transconductance amplifier, it is desirable to have
1. a small input resistance and a small output resistance
2. a small input resistance and a large output resistance
3. x ® a large input resistance and a large output resistance
4. a large input resistance and a small output resistance

14. [1.000] (IP:281470865277619 | 11:45:17 | 11:45:25 | 00:08 | 7.587)

What does the acronym 'API' stand for in programming contexts?
1. Abstract Program Implementation
2. Application Processing Intermediary
3. x ® Application Programming Interface
4. Automatic Procedure Invocation

15. [1.000] (IP:281470865277619 | 11:45:25 | 11:45:44 | 00:19 | 18.637)

Which of the following is an example of non-volatile memory?
1. x ® ROM (Read-Only Memory)
2. Cache Memory
3. RAM (Random Access Memory)
4. Virtual Memory

16. [1.000] (IP:281470865277619 | 11:45:44 | 11:45:58 | 00:14 | 14.228)

What is the purpose of using the Fourier Transform while analyzing any basic signals at
 different
frequencies?
1. Plotting of angle
2. All
3. Transformation from frequency to time domain
4. x ® Transformation from time to frequency and plotting amplitude frequency spectrum

17. [1.000] (IP:281470865277619 | 11:45:58 | 11:47:14 | 01:16 | 25.59)

What is the role of a conditional statement in programming?
1. To store data for later use
2. x ® To control the flow of execution based on certain conditions.
3. To iterate through a loop a specific number of times.
4. To perform mathematical calculations.

18. [1.000] (IP:281470865277619 | 11:47:15 | 11:48:18 | 01:03 | 30.52)

To measure the current pass through each element of the circuit how can you insert the meter
in
circuit.
1. All are possible
2. In parallel to the element
3. x ® In Series to the element
4. Both in parallel and series to the element

19. [0.000] (IP:281470865277619 | 11:48:18 | 11:48:50 | 00:32 | 31.446)

A half-wave rectifier has an input voltage of 240 V r.m.s. If the step-down transformer has a
turn’s ratio of 8:1, what is the peak load voltage? Ignore diode drop.
1. 27.5 V
2. 86.5 V
3. ® 42.5 V
4. x 30 V

20. [0.000] (IP:281470865277619 | 11:48:50 | 11:50:52 | 02:02 | 121.653)

The Boolean expression for the truth table shown is

1. ® L’(K+ M)(K+ M’)

2. x L(K +M’)(K’ + M)
3. L (K+ M) (K’+ M’)
4. L(K+ M)(K’ +M’)
21. [1.000] (IP:281470865277619 | 11:50:52 | 11:51:26 | 00:34 | 34.471)
In clamper circuits design the capacitor is required to be very large. What is the advantage
of having large capacitor?
1. Supplying the AC voltage to the Load and increase ripple
2. Allow to pass DC components while charging
3. Used to slowly discharge while the diode is in forward bias condition
4. x ® Used to slowly discharge while the diode is in reverse bias condition

22. [1.000] (IP:281470865277619 | 11:51:26 | 11:51:56 | 00:30 | 29.24)

For the BJT circuit shown, assume that the β of the transistor is very large and VBE = 0 7V.
The mode of operation of the BJT is

1. x ® saturation
2. normal active
3. cut-off
4. reverse active

23. [1.000] (IP:281470865277619 | 11:51:56 | 11:52:15 | 00:19 | 18.895)

For the diagram shown below find the T parameter T22

1. x ® 4/3
2. 5/3Ω
3. 11/3 mho
4. 1/3Ω

24. [0.000] (IP:281470865277619 | 11:52:15 | 11:52:31 | 00:16 | 15.959)

An ideal voltmeter functions as __________ circuit
1. A power
2. ® An open
3. An infinite
4. x short

25. [0.000] (IP:281470865277619 | 11:52:31 | 11:52:43 | 00:12 | 11.463)

Find the maximum power that can be transferred to this load.
 1. ®

2.

3. x

4.

26. [1.000] (IP:281470865277619 | 11:52:43 | 11:53:04 | 00:21 | 20.763)

A reverse bias pn junction has
1. Very low resistance
2. x ® Almost no current
3. Very narrow depletion layer
4. Large current flow

27. [1.000] (IP:281470865277619 | 11:53:04 | 11:53:25 | 00:21 | 21.428)

In the figure below, discovered the feasible value of L2 for the admittance function Y(s) =

1. 3/2H
2. x ® 2/3H
3. 2H
4. 1/2H
28. [0.000] (IP:281470865277619 | 11:53:25 | 11:54:17 | 00:52 | 51.081)
For small increase in Gate voltage beyond 1V, which of the following gives the correct
description of the region of operation of each MOSFET
1. Both the MOSFETs are in Active region
2. ® n- MOSFET is in saturation and p -MOSFET is in Active region
3. x n-MOSFETs is in Active and p -MOSFET is in saturation region
4. Both the MOSFETs are in saturation region

29. [0.000] (IP:281470865277619 | 11:54:17 | 11:54:53 | 00:36 | 36.28)

The DC current through each diode in a bridge rectifier equals:
1. Twice the DC load current
2. ® The load currents
3. Half the DC load current
4. x One-fourth the DC load
current

30. [1.000] (IP:281470865277619 | 11:54:53 | 11:56:26 | 01:33 | 82.427)

Which of the following refers to a parallel circuit?
1. The voltage across element is in proportion to its resistance value
2. The current through each element is same
3. The equivalent resistance is greater than any one of the resistors
4. x ® The current through any one element is less than the source current

31. [1.000] (IP:281470865277619 | 11:56:26 | 11:56:34 | 00:08 | 7.865)

Which component of a computer is responsible for executing instructions and performing
calculations?
1. Virtual Memory
2. Hard Disk Drive (HDD)
3. x ® Central Processing Unit (CPU)
4. Random Access Memory (RAM)

32. [1.000] (IP:281470865277619 | 11:56:34 | 11:56:43 | 00:09 | 8.086)

In C++, which tool translates source code into machine code, which can be directly executed by
the
computer's processor?
1. x ® Compiler
2. Interpreter
3. Profiler
4. Debugger

33. [0.000] (IP:281470865277619 | 11:56:43 | 11:56:54 | 00:11 | 11.24)

Referring to the circuit below, what is the Norton equivalent impedance at terminals a‑b:
 1. −j2 Ω
2. x j2 Ω
3. ® −j4 Ω
4. j4 Ω

34. [0.000] (IP:281470865277619 | 11:56:54 | 11:57:39 | 00:45 | 44.266)

Which of the following is not the properties of transfer function
1. ® It is defined only for a linear time-invariant system
2. The transfer function between an input variable and an output variable of a system
is defined as the Laplace transform of the impulse response
3. x all initial conditions of the system are set to zero
4. The transfer function is dependent on the input of the system

35. [0.000] (IP:281470865277619 | 11:57:39 | 11:58:33 | 00:54 | 53.375)

Below stated is the procedure of mesh analysis, but in mixed steps. Select the appropriate step
number sequence:
A. Write Kirchhoff’s voltage law equation around each mesh
B. Identify the meshes, (the open windows of the circuit)
C. Assign a current variable to each mesh, using a consistent direction
D. Solve for the other elements currents and voltages you want using ohms law
E. Solve the resulting system of the equations for all mesh currents
1. ® B, C, A, E, D
2. x B, C, A, D, E
3. A, B, C, D, E
4. A, B, C, E, D

36. [0.000] (IP:281470865277619 | 11:58:33 | 11:59:03 | 00:30 | 29.544)

In which of the following power supplies are used for high voltage, low current devices
1. Rectifiers
2. ® Voltage multipliers
3. x Regulators
4. Clipper circuits

37. [0.000] (IP:281470865277619 | 11:59:03 | 11:59:23 | 00:20 | 20.123)

Which error detection method uses one’s complement arithmetic?
1. Two-dimensional parity check
2. CRC
3. ® Checksum
4. x Simple parity check
38. [0.000] (IP:281470865277619 | 11:59:23 | 12:00:47 | 01:24 | 83.746)
Consider a 3-bit counter, designed using T flip-flop, as shown below,

Assuming the initial state of the counter given by PQR as 000, what are the next three states?
1. x 001,010,000
2. 001,010,111
3. ® 011,101,000
4. 011,101,111

39. [0.000] (IP:281470865277619 | 12:00:47 | 12:02:21 | 01:34 | 94.063)

For the K map in the given figure the simplified Boolean expression is

1. x NONE
2. A'C + A'D' + ABC
3. A'C' + A'D' + ABC
4. ® A'C + A'D' + ACD

40. [1.000] (IP:281470865277619 | 12:02:21 | 12:02:42 | 00:21 | 20.375)

The poles and zeros of driving point impedance function and driving point admittance
function lie on
1. x ® Left half of s-plane or on imaginary axis
2. Right half of s-plane
3. Left half of s-plane
4. Right half of s-plane or imaginary axis

41. [0.000] (IP:281470865277619 | 12:02:42 | 12:03:25 | 00:43 | 43.035)

With the positive probe on an NPN base, an ohmmeter reading between the other transistor
terminals should be:
1. ® low resistance
2. x Open
3. infinite
4. high resistance
42. [0.000] (IP:281470865277619 | 12:03:25 | 12:03:41 | 00:16 | 15.588)
For bilateral Inverse Laplace Transform for determining the nature of time domain signal, what
is the location of poles corresponding to ROC?
1. ® On both sides of ROC
2. x On L.H.S of ROC
3. None
4. On R.H.S of ROC

43. [0.000] (IP:281470865277619 | 12:03:41 | 12:04:24 | 00:43 | 42.089)

A four-variable Boolean function is realized using 4 *1 multiplexers as shown in the figure.

The minimized expression for F(U, V, W, X) is

1. (UV + U’V’) (W’X’+W’X)
2. x (UV’ + U’V) (W’X’+W’X)
3. (UV + U’V’) W’
4. ® (UV’ + U’V) W’

44. [0.000] (IP:281470865277619 | 12:04:24 | 12:04:43 | 00:19 | 19.699)

The denominator polynomial in a transfer function may not have any missing terms between
the highest and lowest degree, unless
1. x All odd terms are missing
2. All even terms are missing
3. All even or odd terms are missing
4. ® All even and odd terms are missing

45. [0.000] (IP:281470865277619 | 12:04:43 | 12:04:58 | 00:15 | 13.928)

In the figure below, discovered the feasible value of C2 for the admittance function Y(s) =

1. 1/3f
2. x 3f
3. 6f
4. ® 1/6f
46. [1.000] (IP:281470865277619 | 12:04:58 | 12:05:58 | 01:00 | 60.43)
A signal with a maximum frequency of 5 khz is to be sampled. According to the sampling
theorem,
the sampling frequency, which is not valid is
1. 20 kHz
2. 15 kHz
3. x ® 5 kHz
4. 12 kHz

47. [0.000] (IP:281470865277619 | 12:05:58 | 12:06:19 | 00:21 | 20.667)

An Electrical DC circuit has 2 voltage sources and 3 resistors. If the elements of this circuit are
connected at 4-nodes, what is the number of independent loops?
1. 1
2. ® 2
3. Not a valid circuit
4. x none

48. [0.000] (IP:281470865277619 | 12:06:19 | 12:06:48 | 00:29 | 28.246)

For the frequency response of band rejected filter shown below, the Wo is

1. Wo = Wo*Wo
2. x Wo = (Wo + Wo)/2
3. Wo = Wo - Wo
4. ® Wo = (Wo*Wo) (1/2)

49. [1.000] (IP:281470865277619 | 12:06:48 | 12:06:57 | 00:09 | 9.184)

If x(t) = 12 + 8cost + 4cos3t + 2cos5t +···, the magnitude of the dc component is:
1. 4
2. 2
3. 8
4. x ® 12

50. [0.000] (IP:281470865277619 | 12:06:57 | 12:07:20 | 00:23 | 22.481)

Which of the following is not a system?
1. ® Automobile speed
2. x A computer program38.
3. A camera
4. A circuit

51. [1.000] (IP:281470865277619 | 12:07:20 | 12:07:36 | 00:16 | 16.392)

The total average power of a periodic signal is equal to the sum of average powers of the
individual
Fourier coefficients? Which theorem states the definition
1. Transformation theorem
 2. Rayleigh’s Theorem
3. None
4. x ® Parseval’s Theorem

52. [0.000] (IP:281470865277619 | 12:07:36 | 12:08:07 | 00:31 | 22.292)

Which of the following signals are not even?
1. ® sin(t)
2. t3 cos t
3. exp(t)
4. x tsin(t)

53. [0.000] (IP:281470865277619 | 12:08:07 | 12:08:52 | 00:45 | 44.374)

If V1 = 30 sin(ωt + 10°) and V2 = 20 sin(ωt + 50°), which of these statements are true?
1. x V2 lags V1
2. ® V2 leads V1
3. V1 leads V2
4. V1 and V2 are in phase

54. [1.000] (IP:281470865277619 | 12:08:52 | 12:09:05 | 00:13 | 13.379)

A semiconductor has ....................... temperature coefficient of resistance
1. None
2. Zero
3. Positive
4. x ® Negative

55. [1.000] (IP:281470865277619 | 12:09:05 | 12:10:07 | 01:02 | 60.893)

A function of Boolean variables, X, Y and Z is expressed in terms of the min-terms as
F(X, Y, Z) = (1, 2, 5, 6, 7). Which one of the product of sums given below is equal to the function
F(X, Y, Z )
1. (X + +Y + Z).(X + Y' + Z').(X' + Y + Z)
2. (X' + Y' + Z').(X' + Y + Z).(X + Y' + Z')
3. x ® (X + Y + Z').(X' + Y + Z').(X' + Y + Z)(X' + Y' + Z).(X' + Y' + Z')
4. (X' + 'Y + Z).(X' + Y + Z').(X + Y + Z')(X + Y + 'Z).(X + Y + Z')

56. [0.000] (IP:281470865277619 | 12:10:07 | 12:10:40 | 00:33 | 33.542)

A series resistance is connected in the Zener circuit to
1. ® protect the Zener diode
2. x properly reverse bias the Zener diode
3. properly forward bias the Zener diode
4. none

57. [0.000] (IP:281470865277619 | 12:10:40 | 12:10:57 | 00:17 | 16.191)

Which of the following is TRUE about an array in C++
1. ® Arrays store elements contiguously in memory
2. x All
3. Arrays are dynamic data structures
4. The size of an array can grow as required
58. [0.000] (IP:281470865277619 | 12:10:57 | 12:11:28 | 00:31 | 30.789)
Which of the following is TRUE about a compiler and an interpreter in computer programming?
1. x All
2. Compilers are slower than interpreters but produce faster-running programs
3. Compilers run on the target machine, while interpreters run on a separate machine.
4. ® Compilers translate the entire program into machine code before execution, while
interpreters
translate and execute code line by line.

59. [0.000] (IP:281470865277619 | 12:11:28 | 12:12:03 | 00:35 | 35.174)

What is the purpose of a function in programming?
1. ® To perform a specific task or operation
2. To store and organize data
3. To declare variables and constants
4. x To define the structure of a program

60. [0.000] (IP:281470865277619 | 12:12:03 | 12:12:15 | 00:12 | 11.623)

In non-linear network does not satisfy
1. Homogeneity condition
2. Homogeneity, superposition and associative condition
3. ® Both homogeneity and superposition condition
4. x Superposition condition

61. [0.000] (IP:281470865277619 | 12:12:15 | 12:12:36 | 00:21 | 20.896)

In a Y-Y system, a line voltage of 220 V produces a phase voltage of:
1. x 220
2. 311
3. 381
4. ® 127

62. [1.000] (IP:281470865277619 | 12:12:36 | 12:13:06 | 00:30 | 29.747)

Which type of shift register is used to implement a digital up-down counter?
1. Serial in/parallel out (SIPO) type
2. Parallel in/parallel out (PIPO) type
3. x ® Serial in/serial out (SISO) type
4. Parallel in/serial out (PISO) type

63. [0.000] (IP:281470865277619 | 12:13:06 | 12:13:18 | 00:12 | 12.242)

Using voltage-divider biasing, what is the voltage at the gate VGS?
 1. 4.2 V
2. ® 5.2 V
3. x 2.2 V
4. 3.2 V

64. [1.000] (IP:281470865277619 | 12:13:19 | 12:14:06 | 00:47 | 46.451)

What is the purpose of a loop in programming?
1. To define the structure of a program
2. To store multiple values in a single
variable
3. x ® To control the flow of execution based on
a condition.
4. To perform arithmetic calculations.

65. [0.000] (IP:281470865277619 | 12:14:06 | 12:14:50 | 00:44 | 43.472)

In the circuit shown, the power supplied by the voltage source is

1. 5W
2. ® 0W
3. x 100W
4. 10W

66. [1.000] (IP:281470865277619 | 12:14:50 | 12:15:17 | 00:27 | 26.675)

According to the property of Energy Spectral Density (ESD), the auto-correlation function and
the
energy spectral density forms transform pairs is obtained by
1. x ® Fourier Transform
2. All
3. Z-Transform
 4. Laplace Transform

67. [1.000] (IP:281470865277619 | 12:15:17 | 12:15:45 | 00:28 | 27.667)

Which statement is used to define a block of code that will be executed repeatedly as long as a
specified
condition is true?
1. x ® while statement
2. conditional statement
3. if statement
4. switch statement

68. [0.000] (IP:281470865277619 | 12:15:45 | 12:16:24 | 00:39 | 38.213)

Perform 2’s complement subtraction of (7)10 − (11)10.
1. 1110 (or-6)
2. ® 1011 (or -3)
3. x 1100 (or -4)
4. 1101 (or -5)

69. [0.000] (IP:281470865277619 | 12:16:24 | 12:16:48 | 00:24 | 23.41)

Which of these is not true?

1. x
2. cos(t)σ(t) = σ(t)
3. t2σ(t) 0
4. ® sin(t)σ(t-π) = σ(t- π)

70. [0.000] (IP:281470865277619 | 12:16:48 | 12:17:10 | 00:22 | 21.775)

Which of the following function are suitable in representing the driving point immittance
function?

1.
2. x none
3. ® Z(S) = (s2 + s + 2)/(2s2 + s + 2)

4.

71. [0.000] (IP:281470865277619 | 12:17:10 | 12:17:28 | 00:18 | 18.402)

Which of the following is correct for a gated D-type flip-flop?
1. ® The Q output is either SET or RESET as soon as the D input goes HIGH or LOW
2. x The output toggles if one of the inputs is held HIGH
3. Only one of the inputs can be HIGH at a time
4. The output complement follows the input when enabled

72. [0.000] (IP:281470865277619 | 12:17:28 | 12:18:51 | 01:23 | 82.856)

An initially neutral body has 1.7 µC of negative charge removed. Later, 18.7 x 1011 electrons
are added. What is the body’s final charge?
 1. ® 1.4 µC
2. x 1.5 µC
3. 16 µC
4. 1 µC

73. [0.000] (IP:281470865277619 | 12:18:51 | 12:19:25 | 00:34 | 33.626)

What happens to the original variable when passing by reference?
1. ® The original variable is modified directly
2. The original variable is deleted
3. x The original variable is unaffected
4. The original variable is replaced with the function's return value

74. [1.000] (IP:281470865277619 | 12:19:25 | 12:19:34 | 00:09 | 7.765)

A pn junction acts as a
1. x ® Unidirectional switch
2. Bidirectional switch
3. Controlled switch
4. None

75. [0.000] (IP:281470865277619 | 12:19:34 | 12:20:53 | 01:19 | 77.896)

The number of select lines ‘m’, required to select one out of ‘n’ input lines is
1. ® m = 2n
2. m = logn
3. x m = log2n
4. m = ln n

76. [1.000] (IP:281470865277619 | 12:20:53 | 12:22:02 | 01:09 | 69.082)

When an input delta of 2 V produces a transconductance of 1.5 mS, what is the drain current
delta?
1. 0.5mA
2. 666 mA
3. 0.75 mA
4. x ® 3 mA

77. [0.000] (IP:281470865277619 | 12:22:02 | 12:22:34 | 00:32 | 31.934)

The maximum current flow through Zener diode can be determined by
1. The voltage rating of the Zener diode
2. The maximum current flow through the load
3. x Maximum current flow in the line/source
4. ® Maximum power rating of the Zener diode

78. [0.000] (IP:281470865277619 | 12:22:34 | 12:23:21 | 00:47 | 45.729)

For a periodic signal x(t) = 10sin100t + 10cos300t + 10sin(500t + π/4), the fundamental
frequency in rad/s is
1. ® 100
2. 300
3. x 500
4. 1500
79. [1.000] (IP:281470865277619 | 12:23:21 | 12:23:38 | 00:17 | 15.92)
Efficiency of rectifier increases with…
1. x ® Increasing number of diodes
2. Increasing the primary and secondary transformer turning ratio
3. Increasing ripple and form factor
4. Increasing peak inverse voltage (PIV)

80. [1.000] (IP:281470865277619 | 12:23:38 | 12:23:58 | 00:20 | 17.515)

Which, among the following, is the formula for induced emf?
1. e=t*ϕ
2. e=t2ϕ
3. x ® e=dϕ /dt
4. e=dt/dϕ

81. [1.000] (IP:281470865277619 | 12:23:58 | 12:24:46 | 00:48 | 47.449)

The Minimum Boolean expression for the following circuit is

1. x ® AB+AC+BC
2. A+BC
3. A+B+C
4. A+B

82. [1.000] (IP:281470865277619 | 12:24:46 | 12:25:00 | 00:14 | 13.609)

A linear time invariant system is stable if:
1. System in excited by the bounded input, the output is not bounded
2. x ® System in excited by the bounded input, the output is also bounded
3. None
4. In the absence of input output tends infinity

83. [0.000] (IP:281470865277619 | 12:25:00 | 12:25:07 | 00:07 | 6.794)

For the two-port network shown below find the Z12 parameter

1. ® 3Ω
2. 1Ω
3. x 4Ω
 4. 5Ω

84. [0.000] (IP:281470865277619 | 12:25:07 | 12:25:15 | 00:08 | 7.757)

During realizing of one port network Foster I and II forms are obtained by
1. x Partial fraction expansion of Impedance only
2. Continued –fraction expansion of Impedance and Admittance
3. ® Partial fraction expansion of Impedance and Admittance
4. Continued –fraction expansion of Admittance only

85. [1.000] (IP:281470865277619 | 12:25:15 | 12:25:23 | 00:08 | 7.348)

The unilateral Laplace transform of is

The unilateral Laplace transform of tf(t) is given by

1.

2.

3. x ®

4.

86. [0.000] (IP:281470865277619 | 12:25:23 | 12:25:31 | 00:08 | 7.812)

The roots of the odd and even parts of Hurwitz polynomial P(s) lie on
1. x Left half of s-plane
2. ® On jw axis
3. None
4. Right half of s-plane

87. [0.000] (IP:281470865277619 | 12:25:31 | 12:26:00 | 00:29 | 29.531)

Which technical approach in computer programming emphasizes breaking down complex
problems into
smaller, manageable parts?
1. Greedy Approach
2. Dynamic Programming
3. x Bottom-up design
 4. ® Top-down design

88. [0.000] (IP:281470865277619 | 12:26:00 | 12:26:31 | 00:31 | 30.904)

A network contains linear resistors and ideal voltage sources. If the value of the resistors is
doubled, the voltage across each resistor is
1. Increased by four
2. x Doubled
3. ® No change
4. Halved

89. [1.000] (IP:281470865277619 | 12:26:32 | 12:26:55 | 00:23 | 23.238)

For the circuit shown in figure, find the power loss in the 1/2Ω resistor.

1. 0.64W
2. 64W
3. x ® 8W
4. 80W

90. [1.000] (IP:281470865277619 | 12:26:55 | 12:27:05 | 00:10 | 10.334)

In a ∆-∆ system, a phase voltage of 100 V produces a line voltage of:
1. x ® 100
2. 71
3. 141
4. 58

91. [0.000] (IP:281470865277619 | 12:27:06 | 12:28:04 | 00:58 | 56.978)

In the circuit of the given figure, Y =

1. x 0
2. 1
3. ® X'
4. X

92. [0.000] (IP:281470865277619 | 12:28:04 | 12:28:13 | 00:09 | 8.871)

The continuous time system described by y(t)=x(t2)
 1. x Casual,linear and time varying
2. Non-casual,non linear and time varying
3. Casual,nonlinear and time varying
4. ® Non casual,linear and time varying

93. [0.000] (IP:281470865277619 | 12:28:13 | 12:28:30 | 00:17 | 15.561)

Which of the following is not properties of L-C functions?
1. The highest power of numerator and denominator differ by unity
2. Transfer function is in the ratio of even to odd or odd to even polynomials
3. ® The lowest power of numerator and denominator must be equal
4. x The pole and zeros interlace on the jw- axis

94. [0.000] (IP:281470865277619 | 12:28:30 | 12:29:07 | 00:37 | 5.264)

Which of the following is the correct way to declare a reference variable in C++?
1. int& x = y;
2. int x = &y;
3. x int* x = &y;
4. ® int& x;

95. [0.000] (IP:281470865277619 | 12:28:58 | 12:29:57 | 00:59 | 48.88)

When two systems with impulse responses ℎ1(t) and h2(t) are connected in series, the impulse
response of the composite system is
1. h1(t) / h2(t)
2. x h1(t) + h2(t)
3. ® h1(t) * h2(t)
4. none

96. [1.000] (IP:281470865277619 | 12:29:57 | 12:30:48 | 00:51 | 50.747)

You as an Engineer are developing a C++ program to simulate the charging process of a
battery
with finite capacity. Which data type would be most appropriate for representing the remaining
battery
charge level to display in a small device screen?
1. x ® An integer representing the percentage of remaining charge (0-100)
2. A floating-point number representing the exact remaining charge percentage with
decimal precision
3. A Boolean value (True for full, False for empty)
4. A custom data type encapsulating both charge level and charging/discharging rate
information

97. [1.000] (IP:281470865277619 | 12:30:48 | 12:30:52 | 00:04 | 4.212)

Types of ROM memories
1. PROM
2. x ® All
3. EPROM
4. EEPROM
 98. [0.000] (IP:281470865277619 | 12:30:52 | 12:31:34 | 00:42 | 40.289)
Given the signal x(t), which of the following is true for signal x(2t + 8)?
1. ® x(t) is compressed by a factor of 2 and then shifted left by four units
2. x x(t) is expanded by a factor of 2 and then shifted right by four units
3. x(t) shifted to the left by eight units
4. x(t) is reflected about the vertical axis and then shifted

99. [0.000] (IP:281470865277619 | 12:31:34 | 12:31:54 | 00:20 | 19.041)

With a JFET, a ratio of output current change against an input voltage change is called:
1. gain
2. resistivity
3. ® transconductance
4. x siemens

100. [0.000] (IP:281470865277619 | 12:31:54 | 12:32:27 | 00:33 | 32.721)

A J-K flip-flop with J = 1 and K = 1 has a 20 kHz clock input. The Q output is
1. ® A 10 kHz square wave
2. Constantly HIGH
3. x A 20 kHz square wave
4. Constantly LOW