Quiz  /  Semiconductor Device Class 9 MCQ Questions With Answers

  • 1. 
    How is the P-type doping works?

  • Adding an element which has an extra electron
  • Adding an element which has a less electron
  • Adding an element which has an extra Neutron
  • Adding an element which has a less Neutron

  • 2. 
    How many electrons can be in the second shell?

  • 2
  • 4
  • 8
  • 18

  • 3. 
    Why do we need a transformer in the charger?

  • Boosting up the voltage
  • Lowering down the voltage

  • 4. 
    How many electrons are typically in the valance shell of a semiconductor?

  • 2
  • 4
  • 8
  • 18

  • 5. 
    Hole is

  • an anti-particle of electron
  • a vacancy created when an electron leaves a covalent bond.
  • absence of free electrons.
  • an artifically created particle

  • 6. 
    What does the charger do?

  • Convert DC to AC
  • Convert AC to DC
  • Both of them
  • None of them

  • 7. 
    How is the N-type doped semiconductor made?

  • Adding an element which has an extra electron
  • Adding an element which has a less electron
  • Adding an element which has an extra Neutron
  • Adding an element which has a less Neutron.

  • 8. 
    What material is used for p-type doping?

  • copper
  • Iron
  • Boron
  • Phosphorous

  • 9. 
    Copper, silver and gold are good

  • insulators
  • semiconductors
  • conductors
  • super insulators

  • 10. 
    A pn junction is formed by

  • the recombination of electrons and holes
  • ionization
  • the boudary of a p-type and an n-type material
  • the collision of a proton and a neutron

  • 11. 
    What are two types of doping?

  • P-type
  • N-type
  • M-type
  • Both A & B

  • 12. 
    Outer most shell of atom with highest energy level is known as

  • 1st shell
  • 2nd shell
  • valence shell
  • conduction shell

  • 13. 
    How many electrons can be in the first atomic shell?

  • 2
  • 8
  • 18
  • 36

  • 14. 
    Does pure silicon conduct electricity?

  • Always
  • Limited
  • Never

  • 15. 
    What does the diode do?

  • Making a uni directional current flow.
  • Making a bi directional current flow.

  • 16. 
    The most widely used semi-conductive material in electronic device

  • germanium
  • carbon
  • cooper
  • silicon

  • 17. 
    What we have inside of a charger?

  • Transformer
  • Diode
  • none of them
  • both of them
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