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    • ( 1 ) Schottky diodes are also known as

    • 1) PIN diodes
    • 2) hot carrier diodes.
    • 3) step-recovery diodes
    • 4) tunnel diodes.
    • Discussion in forum
      Answer : 2) hot carrier diodes.
      Solution : Schottky diodes are also known as hot carrier diodes.








      discussion


      Answer : 2) hot carrier diodes.

    • ( 2 ) What kind of diode is formed by joining a doped semiconductor region with a metal?

    • 1) laser
    • 2) tunnel
    • 3) pin
    • 4) Schottky
    • Discussion in forum
      Answer : 4) Schottky
      Solution : A metal-semiconductor junction is formed between a metal and a semiconductor, creating a Schottky barrier (instead of a semiconductor-semiconductor junction as in conventional diodes).








      discussion


      Answer : 4) Schottky

    • ( 3 ) Which of the following is an active device

    • 1) an electric bulb
    • 2) a diode
    • 3) a BJT
    • 4) a transformer
    • Discussion in forum
      Answer : 3) a BJT
      Solution : Active devices can generate Power but passive devices can't. BJT alone be termed as a active device








      discussion


      Answer : 3) a BJT

    • ( 4 ) Which diode employs graded doping?

    • 1) zener
    • 2) LED
    • 3) tunnel
    • 4) step-recovery
    • Discussion in forum
      Answer : 4) step-recovery
      Solution : Doping gradually decreases towards junction. Reverse recovery time is less than ordinary diode.








      discussion


      Answer : 4) step-recovery

    • ( 5 ) The voltage across the zener resistance is usually

    • 1) Small
    • 2) Large
    • 3) Measured in volts
    • 4) Subtracted from the breakdown voltage
    • Discussion in forum
      Answer : 1) Small
      Solution : The voltage across the zener resistance is usually small








      discussion


      Answer : 1) Small

    • ( 6 ) In the second approximation, the total voltage across the zener diode is the sum of-the breakdown voltage and the voltage across the

    • 1) Source
    • 2) Series resistor
    • 3) Zener resistance
    • 4) Zener diode
    • Discussion in forum
      Answer : 2) Series resistor
      Solution : In the second approximation, the total voltage across the zener diode is the sum of-the breakdown voltage and the voltage across the Series resistor








      discussion


      Answer : 2) Series resistor

    • ( 7 ) When the light increases, the reverse minority carrier current in a photodiode

    • 1) Decreases
    • 2) Increases
    • 3) Is unaffected
    • 4) Reverses direction
    • Discussion in forum
      Answer : 2) Increases
      Solution : When the light increases, the reverse minority carrier current in a photodiode Increases








      discussion


      Answer : 2) Increases

    • ( 8 ) A blown-fuse indicator uses a

    • 1) Zener diode
    • 2) Constant-current diode
    • 3) Light-emitting diode
    • 4) Back diode
    • Discussion in forum
      Answer : 3) Light-emitting diode
      Solution : A blown-fuse indicator uses a Light-emitting diode








      discussion


      Answer : 3) Light-emitting diode

    • ( 9 ) The device to use for rectifying a weak ac signal is a

    • 1) Zener diode
    • 2) Light-emitting diode
    • 3) Varistor
    • 4) Back diode
    • Discussion in forum
      Answer : 4) Back diode
      Solution : The device to use for rectifying a weak ac signal is a Varistor








      discussion


      Answer : 4) Back diode

    • ( 10 ) A laser diode normally emits

    • 1) neither coherent nor monochromatic light
    • 2) coherent and monochromatic light.
    • 3) monochromatic light.
    • 4) coherent light.
    • Discussion in forum
      Answer : 2) coherent and monochromatic light.
      Solution : A laser diode normally emits coherent and monochromatic light.








      discussion


      Answer : 2) coherent and monochromatic light.





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