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  1. For which one of the following, ''Diodes" are generally used for?

  2. A.

     Rectification

    B.

     Amplification

    C.

     Modulation

    D.

     Filtration

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  3. The width of depletion layer of a P-N junction

  4. A.

     Decreases with light doping

    B.

     Increases with heavy doping

    C.

     Is independent of applied voltage

    D.

     Is increased under reverse bias

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  5. The impurity atoms with which silicon should be doped to make p-type semiconductors are

  6. A.

     Phosphorus

    B.

     Antimony

    C.

     Boron

    D.

     Germanium

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  7. Which of the following is used for regulated electric supply ?

  8. A.

     Zener diode

    B.

     Junction diode

    C.

     Gun diode

    D.

     Tunnel diode

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  9. A NOT gate can be implemented by:

  10. A.

     A single diode

    B.

     Two diodes

    C.

     A single resistor

    D.

     A single transistor

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  11. Where is a transistor most likely to be found ?

  12. A.

     Wrist watch

    B.

     Fuse

    C.

     Hearing aid

    D.

     Fluorescent lamp

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  13. Solids which conduct electricity at higher temperature but not at lower temperature are called

  14. A.

     Super-conductor

    B.

     Metallic-conductor

    C.

     Semi-conductor

    D.

     Insulator

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  15. Which one among the following components can not be developed within an ''integrated circuit"?

  16. A.

     Diode

    B.

     Triode

    C.

     Transformer

    D.

     Transistor

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  17. A metal semiconductor junction diode is called ________

  18. A.

     Schottky diode

    B.

     Photo diode

    C.

     Tunnel diode

    D.

     P-N Junction diode

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  19. Universal gates are

  20. A.

     AND and OR

    B.

     OR and NOT

    C.

     NAND and NOR

    D.

     AND and XOR

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