Quiz  /  Semiconductor Device Class 10 MCQ Questions With Answers

  • 1. 
    When the diode is operated in forward bias mode

  • it offers high resistance
  • it becomes non conductive
  • it is open switch
  • it offers very low resistance

  • 2. 
    A diode is used as rectifier to convert

  • dc to ac
  • ac to dc
  • low current into high current
  • high current into low current

  • 3. 
    Zener diode are used as voltage regulator

  • true
  • false

  • 4. 
    Semiconductor are substances whose electrical conductivity lies between that of

  • conductor and insulator
  • conductor and metal
  • plastic and wood
  • insulator and gold

  • 5. 
    In solar cell the short circuit current .......with light intensity

  • increases
  • decreases
  • remains unchanged
  • falls down to zero

  • 6. 
    Zener diode is always used in reverse bias

  • true
  • false

  • 7. 
    A device that converts the energy of light directly into electrical energy is

  • photodiode
  • LED
  • Solar Cell
  • rectifier diode

  • 8. 
    Zener diodes are mostly used in

  • current regulator circuit
  • power regulator circuit
  • voltage regulator circuit
  • rectifier circuit

  • 9. 
    A diode made of GaAs emits dark ....... light

  • red
  • green
  • blue

  • 10. 
    When diode is operated in forward bias mode it offers very low resistance in the circuit

  • true
  • false

  • 11. 
    In zener diode construction to have tunneling current the metallurgical junction is very sharp and doping is high

  • true
  • false

  • 12. 
    In burglar alarm which type of diode is used

  • rectifier diode
  • zener diode
  • photo diode
  • Switching Diode

  • 13. 
    A photodiode is used in ................... mode

  • Reverse Bias
  • reverse biased
  • reverse biaseding
  • All of above

  • 14. 
    In the reverse bias operation diode offers high resistance in the circuit

  • true
  • false

  • 15. 
    Current limiting resistance value used in series with LED is normally between

  • 220Ω to 330Ω
  • 220kΩ to 330kΩ
  • 220MΩ to 330MΩ
  • 50Ω to 55Ω

  • 16. 
    A pn junction diode which has a sharp breakdown voltage is known as

  • zener diode
  • rectifier diode switching diode
  • switching diode
  • varactor diode

  • 17. 
    An optocoupler is used as

  • isolator circuit
  • coupling device
  • magnifying device
  • colourful device

  • 18. 
    Optocouplers are available in Integrated circuit form

  • true
  • false

  • 19. 
    The silver ring marked on diode indicates

  • anode
  • tolerance ± %
  • current rating
  • cathode

  • 20. 
    Colour of the LED output light is decided by

  • coloured glass covering it
  • colour added at time of manufacturing
  • material used for its construction
  • size of LED

  • 21. 
    In optocoupler LED and ............ are enclosed in one package

  • rectifier diode
  • photo transistor
  • zener diode
  • resistor

  • 22. 
    The reference level of a signal can be changed by using ........

  • Clipper circuit
  • clamper circuit
  • zero level circuit
  • rectifier circuit

  • 23. 
    A zener diode is a heavily doped pn junction which is always used in

  • Forward bias mode
  • cut off mode
  • Reverse bias mode
  • series of load resistor
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