Semiconductor Electronics Two Marks Questions

12th Standard EM

    Reg.No. :
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Physics

Time : 00:45:00 Hrs
Total Marks : 28
    14 x 2 = 28
  1. Define electron motion in a semiconductor.

  2. Distinguish between Intrinsic and extrinsic semiconductors.

  3. What do you mean by doping?

  4. How electron-hole pairs are created in a semiconductor material?

  5. A diode is called as a unidirectional device. Explain.

  6. What do you mean by leakage current in a diode?

  7. Draw the output waveform of a full wave rectifier.

  8. Distinguish between avalanche and zener breakdown.

  9. Discuss the biasing polarities in an NPN and PNP transistors

  10. Explain the current flow in a NPN transistor

  11. What is the phase relationship between the AC input and output voltages in a common emitter amplifier? What is the reason for the phase reversal?

  12. Explain the need for a feedback circuit in a transistor oscillator.

  13. Give circuit symbol, logical operation, truth table, and Boolean expression of AND, OR, NOT, NAND, NOR, and EX-OR gates

  14. State De Morgan's first and second theorems

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