Diodes and Applications Questions and Answers

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Q21
When checking a diode, low resistance readings both ways indicate the diode is:
  • A open
  • B satisfactory
  • C faulty
  • D not the problem
Answer: Option C
Q22
In a diode schematic, the anode is represented by a(n):
  • A triangle
  • B vertical line
  • C zig-zag line
  • D element indicator
Answer: Option A
Q23
An IC regulator receives an overload; it will:
  • A shut down
  • B compensate for heat
  • C provide more voltage
  • D sample and adjust
Answer: Option A
Q24
With full-wave rectification, current through the load resistor must be:
  • A in opposite directions
  • B to the external load
  • C from the reverse biased diode
  • D in the same direction
Answer: Option D
Q25
A characteristic curve is the result of a current versus voltage plot of diode activity, which begins at the:
  • A 3rd quadrant
  • B current plot
  • C graph origin
  • D voltage plot
Answer: Option C
Q26
Rectifier output polarity depends upon:
  • A cycles of input
  • B capacitor polarity
  • C half or full wave
  • D diode installation
Answer: Option D
Q27
If the frequency of the applied ac signal to a half-wave rectifier is 60 Hz, the frequency of the pulsating dc output will be
  • A 30 pps
  • B 60 pps
  • C 90 pps
  • D 120 pps
Answer: Option B
Q28
Thermal shutdown occurs in an IC regulator if:
  • A power dissipation is too high
  • B internal temperature is too high
  • C current through the device is too high
  • D load resistance increases
Answer: Option B
Q29
The conduction band is closest to the valence band in
  • A semiconductors
  • B conductors
  • C insulators
  • D The distance is the same for all of the above.
Answer: Option B
Q30
With a half-wave rectified voltage across the load resistor, load current flows for what part of a cycle?
  • A 0 degrees
  • B 90 degrees
  • C 180 degrees
  • D 360 degrees
Answer: Option C

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