Semiconductors NEET Questions

Physics - Electronic Devices

Semiconductors MCQ Questions


1.
Which of the following is a type of intrinsic semiconductor?
A.
Silicon
B.
Germanium
C.
Gallium Arsenide
D.
Copper
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ANSWER :
A. Silicon
2.
The electrical conductivity of a semiconductor increases with:
A.
Increase in temperature
B.
Decrease in temperature
C.
Increase in impurity concentration
D.
Application of a magnetic field
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ANSWER :
A. Increase in temperature
3.
In an n-type semiconductor, the majority charge carriers are:
A.
Holes
B.
Electrons
C.
Neutrons
D.
Protons
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ANSWER :
B. Electrons
4.
A p-n junction diode allows current to flow when:
A.
Forward biased
B.
Reverse biased
C.
Both forward and reverse biased
D.
Neither forward nor reverse biased
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ANSWER :
A. Forward biased
5.
Which of the following is a semiconductor?

NEET - 2015

A.
Copper
B.
Silicon
C.
Iron
D.
Silver
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ANSWER :
B. Silicon
6.
The depletion region in a p-n junction is formed due to:
A.
Thermal agitation
B.
Diffusion of charge carriers
C.
Recombination of charge carriers
D.
Ionization of atoms
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ANSWER :
B. Diffusion of charge carriers