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MCQs

Total Questions : 44 | Page 2 of 5 pages
Question 11. A zener diode has ___________ breakdown voltage
  1.    undefined
  2.    sharp
  3.    zero
  4.    none of the above
 Discuss Question
Answer: Option B. -> sharp
Question 12. A zener diode is always ___________ connected.
  1.    reverse
  2.    forward
  3.    either reverse or forward
  4.    none of the above
 Discuss Question
Answer: Option A. -> reverse
Question 13. A crystal diode is a ___________ device
  1.    non-linear
  2.    bilateral
  3.    linear
  4.    none of the above
 Discuss Question
Answer: Option A. -> non-linear
Question 14. A crystal diode has
  1.    one pn junction
  2.    two pn junctions
  3.    three pn junctions
  4.    none of the above
 Discuss Question
Answer: Option A. -> one pn junction
Question 15. A 10 V power supply would use ___________ as filter capacitor.
  1.    paper capacitor
  2.    mica capacitor
  3.    electrolytic capacitor
  4.    air capacitor
 Discuss Question
Answer: Option C. -> electrolytic capacitor
Question 16. If the a.c. input to a half-wave rectifier is an r.m.s value of 400/√2 volts, then diode PIV rating is ___________
  1.    400/√2 V
  2.    400 V
  3.    400 x √2 V
  4.    none of the above
 Discuss Question
Answer: Option B. -> 400 V
Question 17. The PIV rating of each diode in a bridge rectifier is ___________ that of the equivalent centre-tap rectifier
  1.    one-half
  2.    the same as
  3.    twice
  4.    four times
 Discuss Question
Answer: Option A. -> one-half
Question 18. When a crystal diode is used as a rectifier, the most important consideration is ___________
  1.    forward characteristic
  2.    doping level
  3.    reverse characteristic
  4.    PIC rating
 Discuss Question
Answer: Option D. -> PIC rating
Question 19. The knee voltage of a crystal diode is approximately equal to ___________
  1.    applied voltage
  2.    breakdown voltage
  3.    forward voltage
  4.    barrier potential
 Discuss Question
Answer: Option D. -> barrier potential
Question 20. When the graph between current through and voltage across a device is a straight line, the device is referred to as ___________
  1.    linear
  2.    active
  3.    nonlinear
  4.    passive
 Discuss Question
Answer: Option A. -> linear

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