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MCQs

Total Questions : 848 | Page 84 of 85 pages
Question 831. _________ is a semiconductor device which depends for its operation on the control of current by an electric field
  1.    FET
  2.    BJT
  3.    P-N Junction Diode
  4.    none of these
 Discuss Question
Answer: Option A. -> FET


FET


Question 832. _________ circuit converts the electrical energy in the form of DC into electrical energy in the form of AC
  1.    Oscillator
  2.    Amplifier
  3.    Transistor
  4.    none of these
 Discuss Question
Answer: Option A. -> Oscillator


Oscillator


Question 833. Which of the following options defines the diode
  1.    Is the simplest of semiconductor devices
  2.    Has characteristics that closely match those of a simple switch
  3.    Is a two terminal device
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above


All the above


Question 834. Which of the following elements are most frequently used for doping pure Ge or Si ?
  1.    Boron
  2.    Gallium
  3.    Indium
  4.    all the above
 Discuss Question
Answer: Option D. -> all the above


all the above


Question 835. One ev is equal to __________ J
  1.    6.02 * 1023
  2.    1.6 * 10-19
  3.    6.25 * 1018
  4.    1.66 * 10-24
 Discuss Question
Answer: Option B. -> 1.6 * 10-19


1.6 * 10-19


Question 836. ____ number of terminals does a diode have
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option B. -> 2


2 A diode is a two “ terminal electronic component with asymmetric conductance & it has low resistance to current in one direction & high resistance in the other


Question 837. In which of the following state does the silicon diode has the voltage drop of 0.7V ?
  1.    No bias
  2.    Forward Bias
  3.    Reverse Bias
  4.    Zener region
 Discuss Question
Answer: Option B. -> Forward Bias


Forward Bias


Question 838. Find the static resistance of the diode having ID = 30 mA & VD = 0.75 V
  1.    25
  2.    40
  3.    0.04
  4.    0.025
 Discuss Question
Answer: Option A. -> 25


25
According to Ohm's law V = I * R
Therefore VD = ID * R, R= VD/ID = 0.75*1000/30=25


Question 839. An open circuit can have any voltage across its terminals, but the current is always _____
  1.    5 A
  2.    0 A
  3.    1 A
  4.    âˆž
 Discuss Question
Answer: Option B. -> 0 A


0 A


Question 840. A short circuit has a _________ drop across its terminals, & the current is limited only by the surrounding network
  1.    5 A
  2.    0 A
  3.    1 A
  4.    âˆž
 Discuss Question
Answer: Option B. -> 0 A


0 A


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