Quiz  /  Pn Junction Diode Gate & PSU MCQ Questions With Answers

  • 1. 
    What is ripple factor for full wave bridge rectifier

  • 0.482
  • 1.21

  • 2. 
    Diode has polarity

  • anode and cathode
  • on and off
  • output and input
  • none of the above

  • 3. 
    In a reverse biased PN junction, the current through the junction increases abruptly at

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

  • 4. 
    Barrier potential for Si___

  • 0.3 V
  • 0.7V

  • 5. 
    Resistors, capacitors, and inductors are example of ____components

  • Active
  • Passive

  • 6. 
    The majority charge carriers in p-type semiconductors are

  • holes
  • electrons
  • both electrons and holes
  • none f the above

  • 7. 
    In reverse bias the reverse saturation current is due to

  • minority charge carriers
  • majority charge carriers
  • electrons
  • holes

  • 8. 
    1. Zener diodes are also known as

  • Voltage regulators
  • Forward bias diode
  • Breakdown diode
  • None of the mentioned

  • 9. 
    The threshold voltage of Germanium is

  • 0.7 V
  • 0.3 V
  • 1.1 V
  • 0.8 V

  • 10. 
    The Value of Barrier Potential for Si Diode is

  • 1
  • 2
  • 0.5
  • 0.6

  • 11. 
    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 the above

  • 12. 
    In NPN transistor the majority charge carriers in base are

  • Electrons
  • Holes
  • Neither
  • Both

  • 13. 
    Anode is _________ Polarity in diodes

  • Negative
  • Positive
  • Ground
  • Hot Side

  • 14. 
    What is the most common semiconductor material used for producing integrated circuits

  • Quartz
  • Silicon
  • Diamond
  • Tantalum

  • 15. 
    When the diode is forward biased, it is equivalent to

  • An off switch
  • An On switch
  • A high resistance
  • None of the above

  • 16. 
    Initially, the p-type carriers are located to the____________of the semiconductor

  • Right
  • Left
  • Middle
  • TopTop

  • 17. 
    In the Hall Effect, the directions of electric field and magnetic field are parallel to each other.The above statement is

  • a) True
  • b) False

  • 18. 
    In an intrinsic semiconductor, the number of free electrons

  • Equals the number of holes
  • Is greater than the number of holes
  • Is less than the number of holes
  • None of the above

  • 19. 
    Diodes is Categorize as ?

  • Passive components
  • Active components
  • conductor
  • insulator

  • 20. 
    Which of the following results when the equilibrium established in a semiconductor?

  • Restrain the process of diffusion
  • Electric field very high
  • Restrain the process of diffusion and electric field very high
  • None of these

  • 21. 
    The energy band in which free electrons exist is the

  • first band
  • second band
  • conductive band
  • valence band

  • 22. 
    Doping of Semiconductors

  • materials which can conduct electricity better than insulator, but not as well as conductors.
  • The process of adding of a certain amount of specific impurities atoms in the pure semiconductor.
  • when 4 electrons in outermost orbit.

  • 23. 
    What is the name of this Diode?

  • PN junction
  • LED
  • silicon
  • PNP

  • 24. 
    The region which is depleted of mobile charge carriers is called

  • a) Depletion region
  • b)Potential Barrier
  • Both a and b
  • None f the above

  • 25. 
    Materials which can conduct electricity better than insulator,but not as well as conductors. This is the definition of

  • diode
  • semiconductor
  • conductor
  • insulator
  • superconductor

  • 26. 
    During formation of p-n junction

  • an electron diffuses from n to p side
  • a hole diffuses from p to n side
  • a hole diffuses from n to p side
  • an electron diffuses from p to n side

  • 27. 
    Component that Convert AC to DC and allow current to flow in one Direction

  • Capacitor
  • Diode
  • Inverter
  • Resistor

  • 28. 
    In a PN junction when the applied voltage overcomes the ........ potential, the diode current is large, which is known as ......

  • Depletion, negative bias
  • Reverse, reverse bias
  • Resistance, reverse bias
  • Barrier, forward bias

  • 29. 
    The arrow direction in the diode symbol indicates

  • Direction of electron flow
  • Direction of hole flow (Direction of conventional current)
  • Opposite to the direction of hole flow
  • None of the above
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