FEE Unit 1 Notes AKTU (BEC101)

AKTU · BTECH · Semester 1, 2 · Fundamentals of Electronics Engineering · Unit 1 · Notes

AKTU Fundamentals of Electronics Engineering (BEC101) Unit 1 notes for B.Tech Semester 1/2 – Semiconductor Diode and Applications. Topics: Semiconductor…

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Unit 1: Semiconductor Diode and Applications – AKTU syllabus topics

  • Semiconductor Diode Fundamentals: V-I Characteristics and Models, Diode Equivalent Circuits
  • Zener Diode: Zener and Avalanche Breakdown, Zener as Shunt Regulator
  • Rectifier Circuits: Half Wave Rectifier, Full Wave Rectifier
  • Clippers and Clampers
  • Voltage Multiplier Circuits
  • Special Purpose Diodes: Light Emitting Diode, Photo Diode, Varactor and Tunnel Diode

Most asked AKTU PYQ questions from Unit 1

  1. Q2a. Define Clamper. Determine output voltage for the given network. (Circuit: Vi=10V/-20V sinusoidal, 100µF capacitor, 10V battery, RL=10kΩ) (10 marks, 2021-22)
  2. Q2a. What do mean by clipper? Draw the output waveform of the given circuit. (10 marks, 2021-22)
  3. Q3a. In the bridge rectifier circuit, the secondary voltage Vs=100sin50t and load resistance is 1kΩ. Calculate: (i) DC current (ii) RMS value of current (iii) Efficiency (iv) Ripple factor. (10 marks, 2021-22)
  4. Q3b. Determine and draw output voltage for given network. (Clipper: Vi=9V/-9V sinusoidal, R=2.2kΩ, Si diode, 4V battery) (10 marks, 2021-22)
  5. Q3a. Write difference between half wave and Full wave (Centre tap) rectifiers. Draw a neat circuit diagram of bridge rectifier and explain its operation with output waveforms. Drive the average value of current. (7 marks, 2025-26)
  6. Q3a. Compare and analyze the operation and waveforms of half-wave and full-wave rectifiers. Include derivations for average and RMS current. (7 marks, 2024-25)
  7. 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)
  8. Q2a. (i) Explain the working of p-n junction diode and draw its V-I Characteristics. (ii) Sketch the output voltage waveform for the given circuit. Assume ideal diode used. (7 marks, 2025-26)
  9. 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)
  10. Q2a. Draw and explain the V-I characteristics of a semiconductor diode. Explain the functioning of voltage multiplier circuits. (7 marks, 2023-24)

AKTU paper codes: BEC101, BEC201, KEC101, KEC201

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