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EEE :: Semiconductor Diode Multiple

  1. A zener diode has ___________ breakdown voltage

  2. A.

     undefined

    B.

     sharp

    C.

     zero

    D.

     none of the above

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  3. A zener diode is always ___________ connected.

  4. A.

     reverse

    B.

     forward

    C.

     either reverse or forward

    D.

     none of the above

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  5. A crystal diode is a ___________ device

  6. A.

     non-linear

    B.

     bilateral

    C.

     linear

    D.

     none of the above

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  7. A crystal diode has

  8. A.

     one pn junction

    B.

     two pn junctions

    C.

     three pn junctions

    D.

     none of the above

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  9. A 10 V power supply would use ___________ as filter capacitor.

  10. A.

     paper capacitor

    B.

     mica capacitor

    C.

     electrolytic capacitor

    D.

     air capacitor

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  11. If the a.c. input to a half-wave rectifier is an r.m.s value of 400/√2 volts, then diode PIV rating is ___________

  12. A.

     400/√2 V

    B.

     400 V

    C.

     400 x √2 V

    D.

     none of the above

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  13. When a crystal diode is used as a rectifier, the most important consideration is ___________

  14. A.

     forward characteristic

    B.

     doping level

    C.

     reverse characteristic

    D.

     PIC rating

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  15. The PIV rating of each diode in a bridge rectifier is ___________ that of the equivalent centre-tap rectifier

  16. A.

     one-half

    B.

     the same as

    C.

     twice

    D.

     four times

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  17. When the graph between current through and voltage across a device is a straight line, the device is referred to as ___________

  18. A.

     linear

    B.

     active

    C.

     nonlinear

    D.

     passive

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  19. The knee voltage of a crystal diode is approximately equal to ___________

  20. A.

     applied voltage

    B.

     breakdown voltage

    C.

     forward voltage

    D.

     barrier potential

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