CBSE  /  Class 12  /  Physics  /  Semiconductor Electronics: Materials, Devices and Simple Circuits

  • 1. 
    In full wave rectifier, input a.c. current has a frequency v. The output frequency of current is :

  • V/2
  • V
  • 2V
  • None

  • 2. 
    Winch of the following gate is not an universal gate?

  • OR
  • NOT
  • AND
  • NAND

  • 3. 
    Zener diode is used for:

  • producing oscillations in a oscillator
  • amplification
  • stabilisation
  • rectification

  • 4. 
    In semi conductor, at room temperature :

  • the valence bond is partially empty and the conduction band is partially filled
  • the valence band is completely filled and the conduction band is partially filled
  • the valence band is completely filled
  • the conduction band is completely empty

  • 5. 
    Crystal diode is:

  • amplifying device
  • fluctuating device
  • non-linear device
  • linear device

  • 6. 
    The part of a transistor which is heavily doped to produce a large number of majority carriers is :

  • base
  • emitter
  • collector
  • None of these

  • 7. 
    A p-type semiconductor is:

  • negatively charged
  • positively charged
  • uncharged
  • None of these

  • 8. 
    The material most commonly used to manufacture electronic solid state devices is :

  • copper
  • silicon
  • germanium
  • aluminium

  • 9. 
    What is the number of possible crystal systems?

  • 5
  • 7
  • 14
  • 16

  • 10. 
    A forward biased diode is:
    MCQ Questions for Class 12 Physics Chapter 14 Semiconductor Electronics Materials Devices and Simple Circuits with Answers 1

  • a
  • b
  • c
  • d
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