Semiconductor Diode MCQ

Test your knowledge with important Semiconductor Diode MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Semiconductor Diode MCQs at Bissoy

• A zener diode is destroyed if it___________
  ক

  is forward biased

  খ

  is reverse biased

  গ

  carrier more than rated current

  ঘ

  none of the above
• If the PIV rating of a diode is exceeded, ___________
  ক

  the diode conducts poorly

  খ

  the diode is destroyed

  গ

  the diode behaves like a zener diode

  ঘ

  none of the above
• An ideal crystal diode is one which behaves as a perfect ___________ when forward biased.
  ক

  conductor

  খ

  insulator

  গ

  resistance material

  ঘ

  none of the above
• The ___________ filter circuit results in the best voltage regulation
  ক

  choke input

  খ

  capacitor input

  গ

  resistance input

  ঘ

  none of the above
• The doping level in a zener diode is ___________ that of a crystal diode
  ক

  the same as

  খ

  less than

  গ

  more than

  ঘ

  none of the above
• ___________ rectifier has the lowest forward resistance
  ক

  solid state

  খ

  vacuum tube

  গ

  gas tube

  ঘ

  none of the above
• A zener diode utilizes ___________ characteristics for its operation.
  ক

  forward

  খ

  reverse

  গ

  both forward and reverse

  ঘ

  none of the above
• The leakage current in a crystal diode is due to ___________
  ক

  minority carriers

  খ

  majority carriers

  গ

  junction capacitance

  ঘ

  none of the above
• A zener diode is ___________ device
  ক

  a non-linear

  খ

  a linear

  গ

  an amplifying

  ঘ

  none of the above
• There is a need of transformer for ___________
  ক

  half-wave rectifier

  খ

  centre-tap full-wave rectifier

  গ

  bridge full-wave rectifier

  ঘ

  none of the above
• Mains a.c. power is converrted into d.c. power for ___________
  ক

  lighting purposes

  খ

  heaters

  গ

  using in electronic equipment

  ঘ

  none of the above
• The reverse current in a diode is of the order of ___________
  ক

  kA

  খ

  mA

  গ

  μA

  ঘ

  A
• A crystal diode has forward resistance of the order of ___________
  ক

  kΩ

  খ

  Ω

  গ

  MΩ

  ঘ

  none of the above
• If the doping level of a crystal diode is increased, the breakdown voltage___________
  ক

  remains the same

  খ

  is increased

  গ

  is decreased

  ঘ

  none of the above
• The PIV rating of a crystal diode is ___________ that of equivalent vacuum diode
  ক

  the same as

  খ

  lower than

  গ

  more than

  ঘ

  none of the above
• The ratio of reverse resistance and forward resistance of a germanium crystal diode is about ___________
  ক

  1 : 1

  খ

  100 : 1

  গ

  1000 : 1

  ঘ

  40000 : 1
• The forward voltage drop across a silicon diode is about ___________
  ক

  2.5 V

  খ

  3 V

  গ

  10 V

  ঘ

  0.7 V
• A series resistance is connected in the zener circuit to___________
  ক

  properly reverse bias the zener

  খ

  protect the zener

  গ

  properly forward bias the zener

  ঘ

  none of the above
• If the doping level in a crystal diode is increased, the width of depletion layer___________
  ক

  remains the same

  খ

  is decreased

  গ

  in increased

  ঘ

  none of the above
• A zener diode has ___________
  ক

  one pn junction

  খ

  two pn junctions

  গ

  three pn junctions

  ঘ

  none of the above
• The most widely used rectifier is ___________
  ক

  half-wave rectifier

  খ

  centre-tap full-wave rectifier

  গ

  bridge full-wave rectifier

  ঘ

  none of the above
• The maximum efficiency of a half-wave rectifier is ___________
  ক

  40.6%

  খ

  81.2%

  গ

  50%

  ঘ

  25%
• The ripple factor of a half-wave rectifier is ___________
  ক

  2

  খ

  1.21

  গ

  2.5

  ঘ

  0.48
• A crystal diode utilises ___________ characteristic for rectification
  ক

  reverse

  খ

  forward

  গ

  forward or reverse

  ঘ

  none of the above
• The knee voltage of a crystal diode is approximately equal to ___________
  ক

  applied voltage

  খ

  breakdown voltage

  গ

  forward voltage

  ঘ

  barrier potential
• When the graph between current through and voltage across a device is a straight line, the device is referred to as ___________
  ক

  linear

  খ

  active

  গ

  nonlinear

  ঘ

  passive
• The PIV rating of each diode in a bridge rectifier is ___________ that of the equivalent centre-tap rectifier
  ক

  one-half

  খ

  the same as

  গ

  twice

  ঘ

  four times
• When a crystal diode is used as a rectifier, the most important consideration is ___________
  ক

  forward characteristic

  খ

  doping level

  গ

  reverse characteristic

  ঘ

  PIC rating
• If the a.c. input to a half-wave rectifier is an r.m.s value of $$\frac{{400}}{{\sqrt 2 }}$$   volts, then diode PIV rating is ___________
  ক

  $$\frac{{400}}{{\sqrt 2 }}{\text{ V}}$$

  খ

  400 V

  গ

  $$400 \times \sqrt 2 {\text{ V}}$$

  ঘ

  None of the above
• A 10 V power supply would use ___________ as filter capacitor.
  ক

  paper capacitor

  খ

  mica capacitor

  গ

  electrolytic capacitor

  ঘ

  air capacitor