Quiz  /  MCQ On Pn Junction Diode

  • 1. 
    In a PN junction with no external voltage, the electric field between acceptor and donor ion is called a

  • Peak
  • Barrier
  • Threshold
  • Path

  • 2. 
    In a PN junction the potential barrier is due to the charges on either side of the junction, these charges are

  • Majority carriers
  • Minority carriers
  • Both (a) and (b)
  • Fixed donor and accepter ions

  • 3. 
    The capacitance of a reverse-biased PN junction

  • Increases as reverse bias is increased
  • Decreases as reverse bias is increased
  • Increases as reverse bias is decreased
  • Is significantly low

  • 4. 
    For a PN junction diode, the current in reverse bias maybe

  • Few milliamperes
  • Between 0.2 A and 15 A
  • Few amperes
  • Few micro or nano amperes

  • 5. 
    When PN junction is in forward bias, by increasing the battery voltage

  • Circuit resistance increases
  • Current through P_N junction increases
  • Current through P_N junction decreases
  • None of the above

  • 6. 
    When a PN junction is reverse biased

  • Holes and electrons tend to concentrate towards the junction
  • The barrier tends to break down
  • Holes and electrons tend to move away from the junction
  • None of these

  • 7. 
    A PN junction

  • Has low resistance in forward as well as reverse directions
  • Has high resistance in forward as well as reverse directions
  • Conductors in the forward direction only
  • Conducts in the reverse direction only

  • 8. 
    A PN junction is said to be forward-biased when

  • The positive terminal of the battery is connected to P-side and the negative side to the N-side
  • Junction is earthed
  • N-side is connected directly to the p-side
  • The positive terminal of the battery is connected to N-side and the negative side to the P-side.

  • 9. 
    PN junction failure below 5 V is caused primarily by

  • Avalanche breakdown
  • Zener breakdown
  • Either (a) or (b)
  • None of the above

  • 10. 
    In a reverse-biased PN junction, the current through the junction increases abruptly at

  • 0.5 V
  • 1.1 V
  • 0.72 V
  • Breakdown voltage
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