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B. TECH (I-Year)
(BEC-101/BEC-201) FUNDAMENTALS OF ELECTRONICS ENGINEERING
AKTU PYQs
2 Marks Questions
Q.1 What do you mean by Varactor diode? Write its one application. Unit-1 (AKTU 2022-23
Even)
Q.2 Why FET is a voltage-controlled device? Unit-1 (AKTU 2022-23
Even)
Q.3 Compare between Avalanche breakdown and Zener breakdown. Unit-1 (AKTU 2022-23
Odd)
Q.4 Why Varactor diode is also called Varicap ? Explain. Unit-1 (AKTU 2022-23
Odd)
Q.5 Write down the characteristics of Ideal OP-AMP. Unit-2 (AKTU 2022-23
Even)
Q.6 The output of particular OP-AMP increases 8V in 12μs.What is the slew rate. Unit-2 (AKTU 2022-23
Even)
Q.7 Define Pinch-off voltage for JFET. Unit-2 (AKTU 2022-23
Odd)
Q.8 𝐹𝑜𝑟 𝑎 𝑡𝑟𝑎𝑛𝑠𝑖𝑠𝑡𝑜𝑟 𝐼𝐸 = 10 𝑚𝐴 𝑎𝑛𝑑 𝛼 = 0.987. 𝐹𝑖𝑛𝑑 𝐼𝐶 𝑎𝑛𝑑 𝐼𝐵 Unit-2 (AKTU 2022-23
Odd)
Q.9 Derive relation between current gain in CB and CE configuration of transistor. Unit-3 (AKTU 2022-23
Even)
Q.10 Define CMRR and Slew rate of Op-Amp. Unit-3 (AKTU 2022-23
Odd)
Q.11 Calculate the 1’s and 2’scomplement of binary number 1010101. Unit-4 (AKTU 2022-23
Even)
Q.12 Explain Voltage Follower circuit using Op-Amp. Unit-4 (AKTU 2022-23
Odd)
Q.13 Define modulation index for AM wave. Unit-5 (AKTU 2022-23
Even)
Q.14 500 watt carrier power is modulated to depth of 90%, calculate the total Unit-5 (AKTU 2022-23
power in the modulated wave. Odd)
7 Marks Questions
Q.1 Define the various elements of communication system and also draw it’s Unit-1 (AKTU 2022-23
functional block diagram. Even)
Q.2 Explain the working of p-n junction diode and draw its V-I Characteristics. Unit-1 (AKTU 2022-23
Odd)
Q.3 Draw and explain the working of N-P-N transistor in common Emitter Unit-2 (AKTU 2022-23
configuration with its suitable characteristic graph. Even)
Q.4 Draw a neat circuit diagram of bridge rectifier and explain its operation with Unit-2 (AKTU 2022-23
output waveforms. Drive the average value of current and voltage. Odd)
Q.5 Simplify the Boolean function F = ∑ m (0,1,2,5,7,8,9,10,13,15) + d (12,14) Unit-3 (AKTU 2022-23
using K-map and implement the simplified expression using NAND gates only. Even)
Q.6 Calculate the output voltage V0 of the circuit shown in fig 1. Unit-3 (AKTU 2022-23
Odd)
Q.7 Draw and explain the working of Centre - Taped full wave rectifier. Unit-4 (AKTU 2022-23
Also calculate its efficiency and ripple factor. Even)
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Q.8 Define Universal Gates. Implement AND, OR, NOR by using NAND gates only. Unit-4 (AKTU 2022-23
Odd)
Q.9 Explain unity gain amplifier. Determine the output voltage of the following Unit-5 (AKTU 2022-23
network. Even)
Q.10 𝐴𝑛 𝑎𝑢𝑑𝑖𝑜 𝑓𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑦 𝑠𝑖𝑔𝑛𝑎𝑙 20 𝑆𝑖𝑛 2 𝜋 𝑥 500𝑡 𝑖𝑠 𝑢𝑠𝑒𝑑 𝑡𝑜 Unit-5 (AKTU 2022-23
𝑎𝑚𝑝𝑙𝑖𝑡𝑢𝑑𝑒 𝑚𝑜𝑑𝑢𝑙𝑎𝑡𝑒𝑑 𝑎 𝑐𝑎𝑟𝑟𝑖𝑒𝑟 𝑜𝑓 40 𝑆𝑖𝑛 2 𝜋 𝑥 105 𝑡. Odd)
𝑪𝒂𝒍𝒄𝒖𝒍𝒂𝒕𝒆 ∶
(𝑖) 𝑀𝑜𝑑𝑢𝑙𝑎𝑡𝑖𝑜𝑛 𝐼𝑛𝑑𝑒𝑥 (𝑖𝑖) 𝑆𝑖𝑑𝑒𝑏𝑎𝑛𝑑 𝐹𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑦
(𝑖𝑖𝑖) 𝐴𝑚𝑝𝑙𝑖𝑡𝑢𝑑𝑒 𝑜𝑓 𝑒𝑎𝑐ℎ 𝑠𝑖𝑑𝑒𝑏𝑎𝑛𝑑(𝑖𝑣) 𝐵𝑎𝑛𝑑𝑤𝑖𝑑𝑡ℎ 𝑟𝑒𝑞𝑢𝑖𝑟𝑒𝑑
(𝑣) 𝑇𝑜𝑡𝑎𝑙 𝑝𝑜𝑤𝑒𝑟 𝑑𝑒𝑙𝑖𝑣𝑒𝑟𝑒𝑑 𝑡𝑜 𝑡ℎ𝑒 𝑙𝑜𝑎𝑑 𝑜𝑓 2 𝐾 𝛺.
7 Marks Questions
Q.1 Explain the construction, working, and characteristics of n-channel Depletion Unit-1 (AKTU 2022-23
MOSFET. Even)
Q.2 Explain the construction, working, and characteristics of n-channel Unit-1 (AKTU 2022-23
Enhancement MOSFET. Even)
Q.3 (i) Draw the circuit diagram of the voltage tripler circuit. Unit-1 (AKTU 2022-23
Odd)
(ii) Explain the Zener diode as a voltage regulator.
Q.4 Explain the working of following with the help of a suitable diagram. Unit-1 (AKTU 2022-23
Odd)
(i) LED (ii) Photodiodes
7 Marks Questions
Q.1 Determine and draw the output voltage of a given network. Unit-2 (AKTU 2022-23
Even)
Determine the range of input voltage (𝑉𝑠 ) for the Zener diode to remain in Unit-2 (AKTU 2022-23
Q.2 ON state shown in following figure. Given that 𝑉𝑠 = 20𝑉, 𝐼𝑧𝑚𝑎𝑥 Even)
= 50 𝑚𝐴, 𝑅𝑧 = 0Ω .
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Draw the circuit of NPN transistor in common base configuration and discuss Unit-2 (AKTU 2022-23
Q.3 its working. Draw input-output characteristic. Odd)
Explain working principle of Depletion type MOSFET (n-channel). Draw & Unit-2 (AKTU 2022-23
Q.4 Explain its characteristics. Odd)
7 Marks Questions
With the help of the circuit diagram, explain the working of OP-AMP as a non- Unit-3 (AKTU 2022-23
Q.1 inverting summer. Even)
Q.2 With the help of the circuit diagram, explain the working of OP-AMP as an Unit-3 (AKTU 2022-23
Integrator. Even)
Q.3 Draw the block diagram of Op-Amp and list all the ideal characteristics of op - Unit-3 (AKTU 2022-23
amp. Odd)
Q.4 Explain the working of op-amp as a Integrator and drive its output equation. Unit-3 (AKTU 2022-23
Odd)
7 Marks Questions
Q.1 Simplify the following Boolean expression using K-map. f (V, W, X, Y,Z) = ∑ m Unit-4 (AKTU 2022-23
(0, 7, 8, 9, 12, 13, 15, 16, 22, 23, 30, 31) Even)
Q.2 Simplify the Boolean expression using K-map and implement the simplified Unit-4 (AKTU 2022-23
expression using NOR GATEs only. Even)
F(A, B, C, D)=Π M(1, 3, 4, 5, 6, 7, 11, 12, 14, 15)
Minimize using K-map and realize output using gates. Unit-4 (AKTU 2022-23
Q.3 Odd)
F (A, B, C, D) = Σ m (1, 4, 8, 12, 13, 15) + d (3, 14)
𝐶𝑜𝑛𝑣𝑒𝑟𝑡 𝑡ℎ𝑒 𝑓𝑜𝑙𝑙𝑜𝑤𝑖𝑛𝑔: Unit-4 (AKTU 2022-23
Q.4 Odd)
(𝑖)(53.625)10 𝑡𝑜 (? )2
(𝑖𝑖) 𝐹𝑖𝑛𝑑 𝑡ℎ𝑒 𝑏𝑎𝑠𝑒 𝑥 𝑖𝑓 (211)𝑥 = (152)8
(𝑖𝑖𝑖) 𝑆𝑢𝑏𝑡𝑟𝑎𝑐𝑡 𝑢𝑠𝑖𝑛𝑔 1′ 𝑠 𝑐𝑜𝑚𝑝𝑙𝑒𝑚𝑒𝑛𝑡: (10111)2 − (110011)2
(𝑖𝑣) 𝐹𝑖𝑛𝑑 𝑡ℎ𝑒 1′ 𝑠𝑎𝑛𝑑 2′ 𝑠 𝑐𝑜𝑚𝑝𝑙𝑖𝑚𝑒𝑛𝑡 𝑜𝑓 (010100)2
7 Marks Questions
𝐴𝑛 𝑎𝑢𝑑𝑖𝑜 𝑓𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑦 𝑠𝑖𝑔𝑛𝑎𝑙 10 𝑆𝑖𝑛 2 𝜋 𝑥 500𝑡 𝑖𝑠 𝑢𝑠𝑒𝑑 𝑡𝑜 Unit-5 (AKTU 2022-23
Q.1 5 Even)
𝑎𝑚𝑝𝑙𝑖𝑡𝑢𝑑𝑒 𝑚𝑜𝑑𝑢𝑙𝑎𝑡𝑒𝑑 𝑎 𝑐𝑎𝑟𝑟𝑖𝑒𝑟 𝑜𝑓 50 𝑆𝑖𝑛 2 𝜋 𝑥 10 𝑡.
𝑪𝒂𝒍𝒄𝒖𝒍𝒂𝒕𝒆 ∶
(𝑖) 𝑀𝑜𝑑𝑢𝑙𝑎𝑡𝑖𝑜𝑛 𝐼𝑛𝑑𝑒𝑥 (𝑖𝑖𝑖) 𝐴𝑚𝑝𝑙𝑖𝑡𝑢𝑑𝑒 𝑜𝑓 𝑒𝑎𝑐ℎ 𝑠𝑖𝑑𝑒𝑏𝑎𝑛𝑑
(𝑖𝑖) 𝑇𝑜𝑡𝑎𝑙 𝑝𝑜𝑤𝑒𝑟 𝑑𝑒𝑙𝑖𝑣𝑒𝑟𝑒𝑑 𝑡𝑜 𝑡ℎ𝑒 𝑙𝑜𝑎𝑑 𝑜𝑓 2 𝐾 𝛺 (𝑖𝑣) 𝐵𝑎𝑛𝑑𝑤𝑖𝑑𝑡ℎ
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Q.2 Derive the transmission efficiency and total power of amplitude modulated Unit-5 (AKTU 2022-23
wave assuming message and carrier wave as sinusoidal wave. Even)
Q.3 (i) Describe AM modulator with adequate diagram. Unit-5 (AKTU 2022-23
(ii) Explain the elements of communication system with the help of block Odd)
diagram.
Q.4 Explain the satellite and radar system using proper block diagram. Unit-5 (AKTU 2022-23
Odd)
