Electronic Devices and circuits Theory-Diode Applications Questions and Answers

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Q1
A silicon diode measures a low value of resistance with the meter leads in both positions. The trouble, if any, is
  • A the diode is open.
  • B the diode is shorted to ground.
  • C the diode is internally shorted.
  • D the diode is working correctly.
Answer: Option C
Q2
Single-element semiconductors are characterized by atoms with ____ valence electrons.
  • A 3
  • B 4
  • C 5
  • D 2
Answer: Option B
Q3
Under normal conditions a diode conducts current when it is
  • A reverse-biased.
  • B forward-biased.
  • C avalanched.
  • D saturated.
Answer: Option B
Q4
A diode conducts when it is forward-biased, and the anode is connected to the ________ through a limiting resistor.
  • A positive supply
  • B negative supply
  • C cathode
  • D anode
Answer: Option A
Q5
As the forward current through a silicon diode increases, the internal resistance
  • A increases.
  • B decreases.
  • C remains the same.
Answer: Option B
Q6
The movement of free electrons in a conductor is called
  • A voltage.
  • B current.
  • C recombination
  • D equilibrium.
Answer: Option B
Q7
For a forward-biased diode, the barrier potential ________ as temperature increases.
  • A decreases
  • B remains constant
  • C increases
Answer: Option A
Q8
The wide end arrow on a schematic indicates the ________ of a diode.
  • A ground
  • B direction of electron flow
  • C cathode
  • D anode
Answer: Option D
Q9
An n-type semiconductor material
  • A is intrinsic.
  • B has trivalent impurity atoms added.
  • C has pentavalent impurity atoms added
  • D requires no doping.
Answer: Option C
Q10
For a forward-biased diode, as temperature is ________, the forward current ________ for a given value of forward voltage.
  • A decreased, increases
  • B increased, increases
  • C increased, decreases
  • D decreased, decreases
Answer: Option B

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