Exercise: Electronic Devices And Circuits

Questions for: Electronic Devices And Circuits

Which materials find application in MASER?
A:
Diamagnetic
B:
Paramagnetic
C:
Ferromagnetic
D:
Ferrimagnetic
Answer: A
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The depletion layer in a reverse biased p-n junction is due to the presence of
A:
electrons
B:
holes
C:
both electrons and holes
D:
immobile ions
Answer: D
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Which of the following elements act as donor impurities?
  1. Gold
  2. Phosphorus
  3. Boron
  4. Antimony
  5. Arsenic
  6. Indium
Select the correct answer using the codes given below:
A:
1, 2, 3
B:
1, 2, 4, 6
C:
3, 4, 5, 6
D:
2, 4, 5
Answer: D
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The addition of n type impurity to intrinsic material creates allowable energy levels.
A:
slightly below conduction band
B:
slightly above conduction band
C:
slightly below valence band
D:
slightly above valence band
Answer: A
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In N-type semiconductor
A:
electrons are majority carriers while holes are minority carriers
B:
electrons are majority carriers while holes are majority carriers
C:
both electrons as well as holes are majority carriers
D:
both electrons as well as holes are minority carriers
Answer: A
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