Characteristic Curves of a P-N Junction Diode in Forward and Reverse Bias NEET Questions

Physics - Experimental Skills

Characteristic Curves of a P-N Junction Diode in Forward and Reverse Bias MCQ Questions


1.
A semiconductor is a material whose electrical conductivity is:
A.
Lower than an insulator
B.
Higher than a conductor
C.
Same as a conductor
D.
Between that of a conductor and an insulator
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ANSWER :
D. Between that of a conductor and an insulator
2.
Most common semiconductor materials used in p-n junction diodes are:
A.
Carbon and oxygen
B.
Glass and rubber
C.
Silicon (Si) and Germanium (Ge)
D.
Copper and aluminium
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ANSWER :
C. Silicon (Si) and Germanium (Ge)
3.
In an intrinsic (pure) semiconductor at room temperature:
A.
More electrons than holes
B.
No charge carriers
C.
More holes than electrons
D.
Equal numbers of electrons and holes are present (n_e = n_h = n_i)
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ANSWER :
D. Equal numbers of electrons and holes are present (n_e = n_h = n_i)
4.
A p-type semiconductor is created by doping with:
A.
Pentavalent atoms
B.
Tetravalent atoms
C.
Trivalent atoms (e.g., boron, aluminium, indium, gallium)
D.
Hexavalent atoms
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ANSWER :
C. Trivalent atoms (e.g., boron, aluminium, indium, gallium)
5.
An n-type semiconductor is created by doping with:
A.
Trivalent atoms
B.
Tetravalent atoms
C.
Hexavalent atoms
D.
Pentavalent atoms (e.g., phosphorus, arsenic, antimony, bismuth)
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ANSWER :
D. Pentavalent atoms (e.g., phosphorus, arsenic, antimony, bismuth)
6.
In a p-type semiconductor, the majority carriers are:
A.
Electrons
B.
Neither
C.
Both equally
D.
Holes
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ANSWER :
D. Holes