FEE PYQ 2024-25 AKTU (BEC101) Question Paper

AKTU · BTECH · Semester 1, 2 · Fundamentals of Electronics Engineering · Session 2024-25 · PYQ

AKTU Fundamentals of Electronics Engineering (BEC101) previous year question paper 2024-25 for B.Tech Semester 1/2. Covers Semiconductor Diode and…

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Fundamentals of Electronics Engineering AKTU syllabus

  1. Unit 1: Semiconductor Diode and Applications
  2. Unit 2: Transistors — BJT and FET
  3. Unit 3: Operational Amplifiers
  4. Unit 4: Digital Electronics
  5. Unit 5: Fundamentals of Communication Engineering

Questions in Fundamentals of Electronics Engineering AKTU PYQ 2024-25

  1. Q1a. Why does the depletion region width decrease after putting diode in forward bias? (2 marks, 2024-25)
  2. Q1b. What is negative resistance on tunnel diode? (2 marks, 2024-25)
  3. Q1c. Why are FETs known as unipolar and voltage-controlled devices? (2 marks, 2024-25)
  4. Q1d. Write the ideal op-Amp characteristics? (2 marks, 2024-25)
  5. Q1e. Why are NAND and NOR gates called universal gates? (2 marks, 2024-25)
  6. Q1f. What are the binary-arithmetic operations for 11.10 + 10.11 + 111.00 + 110.11+ 001.01=? (2 marks, 2024-25)
  7. Q1g. A 600 watt carrier power is modulated to depth of 80%, calculate the total power in the modulated wave. (2 marks, 2024-25)
  8. Q2a. For the circuit shown in Fig. find the maximum and minimum values of zener diode current. (Circuit: 80–120V supply, R=5kΩ, Vz=50V, RL=10kΩ) (7 marks, 2024-25)
  9. Q2b. Why is common collector mode generally not preferred? Increase in collector emitter voltage from 5V to 8V causes increase in collector current from 5mA to 5.3mA. Determine the dynamic output resistance. (7 marks, 2024-25)
  10. Q2c. Calculate the output voltage for the given circuit. (Op-Amp differential circuit: A=4, Rin1=10kΩ, Rin2=250Ω, RL=3kΩ, inputs 12V and 9V) (7 marks, 2024-25)
  11. Q2d. Explain the working of op-amp as Integrator and derive its output voltage. (7 marks, 2024-25)
  12. Q2e. An AM wave is represented by the expression: V = 5 (1 + 0.6 cos 6280 t) sin 211 × 10⁴ t volts (i) What are the minimum and maximum amplitudes of the AM wave? (ii) What frequency components are contained in the modulated wave and what is the amplitude of each component? (7 marks, 2024-25)
  13. Q3a. An a.c. supply of 230 V is applied to a half-wave rectifier circuit through a transformer of turn ratio 10 : 1. Find (i) the output d.c. voltage and (ii) the peak inverse voltage. Assume the diode to be ideal. (7 marks, 2024-25)
  14. Q3b. What are the advantages of negative clipper circuits? For the given input waveform to the given circuit, what is the peak value of the output waveform? (Vi = ±16V peak, Vbias = 8V) (7 marks, 2024-25)
  15. Q4a. Explain, why is enhancement MOSFET preferred over depletion MOSFET for switching purposes? (7 marks, 2024-25)
  16. Q4b. In CB configuration, the value of α=0.98A. A voltage drop of 4.9V is obtained across the resistor of 5KΩ when connected in collector circuit. Find the base current. (7 marks, 2024-25)
  17. Q5a. Derive the output voltage is proportional to the difference between the two input voltages in Op-amp. (7 marks, 2024-25)
  18. Q5b. Calculate the output of the circuit shown in Fig. (Inverting summing amp: +2V through 1kΩ, +3V through 2kΩ, Rf=5kΩ, non-inverting with 1kΩ to ground) (7 marks, 2024-25)
  19. Q6a. F =∑(0,1,2,3,5,7,13,15) + d(8,10) simplify using K-Map and design logic resultant circuit using basic logic gates. (7 marks, 2024-25)
  20. Q6b. Minimize the following Boolean function in POS form using the K map. f(A,B,C,D,E)=∏M(3,5,6,9,10,11,13,19,21,22,23,25,26,27,29) (7 marks, 2024-25)
  21. Q7a. A sinusoidal carrier voltage of frequency 1 MHz and amplitude 100 volts is amplitude modulated by the sinusoidal voltage of frequency 5 kHz producing 50% modulation. Calculate the frequency and amplitude of lower and upper sideband terms. (7 marks, 2024-25)
  22. Q7b. Derive the transmission efficiency and total power of amplitude modulated wave assuming message and carrier wave as sinusoidal wave. (7 marks, 2024-25)

AKTU paper codes: BEC101, BEC201, KEC101, KEC201

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