Quiz  /  Semiconductor Diode MCQ

  • 1. 
    In the forward bias arrangements of a PN junction diode

  • The N end is connected to the positive terminal of the battery
  • The P end is connected to the positive terminal of the battery
  • The direction of the current is from N end to the P end in the diode
  • The P end is connected to the negative terminal of the battery

  • 2. 
    In a PN junction diode

  • The current in the reverse biased condition is generally very small
  • The current in the reverse biased condition is generally very small but the forward-biased current is independent of the bias voltage
  • The reverse-biased current is strongly dependent on the applied bias voltage
  • The forward biased current is very small in comparison to reverse-biased current.

  • 3. 
    The cut-in voltage for silicon diode is approximately

  • 0.2 V
  • 0.6 V
  • 1.1 V
  • 1.4 V

  • 4. 
    The electrical resistance of the depletion layer is large because

  • It has no change carriers
  • It has a large number of charge carriers
  • It contains electrons as charge carriers
  • It has holes as charge carriers

  • 5. 
    If the forward voltage in a semiconductor diode is doubled, the width of the depletion layer will

  • Become half
  • Become one-fourth
  • Remain unchanged
  • Become double

  • 6. 
    The PN junction diode is used as

  • An amplifier
  • A rectifier
  • An oscillator
  • A modulator

  • 7. 
    When a PN junction diode is reverse biased

  • Electrons and holes are attracted towards each other and move towards the depletion region
  • Electrons and holes move away from the junction depletion region
  • Height of the potential barrier decreases
  • No change in the current takes place

  • 8. 
    A PN junction has a thickness of the order

  • 1 cm
  • 1 mm
  • 10
  • m
  • 10
  • cm

  • 9. 
    In the depletion region of an unbiased PN junction diode there are

  • Only electrons
  • Only holes
  • Both electrons and holes
  • Only fixed ions

  • 10. 
    On increasing the reverse bias to a large value in a PN junction diode, current

  • Increases slowly
  • Remains fixed
  • Suddenly increases
  • Decreases slowly
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