Important MCQs on Semiconductor
In this post, mcqs on semiconductor are given. It includes resistivity of semiconductor, bonds in semiconductor, break co-valent bonds, energy required to break co-valent bonds, forbidden energy gap in semiconductor, conduction gap, valance band, trivalent impurity, temperature co-efficient of resistance, mission electron and charge of hole.
MCQs on Semiconductor: 1 to 5
1 Which of the following is not a semiconductor material?
( a )Carbon
( b )Silicon
( c )Selenium
( d )Graphite
Correct Answer (d): Graphite
2 The resistivity of semiconductor ______ than that of conductor.
( a )Low
( b )High
( c )Very high
( d )Any of the above
Correct Answer (c): Very high
3 The germanium acts as a _____ at very low temperature.
( a )Semiconductor
( b )Conductor
( c )Insulator
( d )Any of the above
Correct Answer (c): Insulator
4 The bonds in the semiconductors are formed by sharing of _____ electrons.
( a )Valance
( b )Free
( c )Conduction
( d )Any of the above
Correct Answer (a): Valance
5 The energy required to break co – valent bonds in the silicon is
( a )0.7 eV
( b )1.0 eV
( c )1.1 eV
( d )1.24 eV
Correct Answer (c): 1.1 eV
MCQs on Semiconductor: 6 to 10
6 The energy required to break co – valent bonds in the germanium is
( a )0.7 eV
( b )1.0 eV
( c )1.1 eV
( d )1.24 eV
Correct Answer (a): 0.7 eV
7 The germanium is a _____ element.
( a )Trivalent
( b )Tetravalent
( c )Pentavalent
( d )None of the above
Correct Answer (b): Tetravalent
8 The forbidden energy gap in the semiconductor is
( a )0.001 eV
( b )1 eV
( c )10 eV
( d )15 eV
Correct Answer (a): 0.001 eV
9 Which of the following band is never empty or always filled with electrons?
( a )Conduction
( b )Valance
( c )Forbidden energy
( d )None of the above
Correct Answer (b): Valance
10 Which of the following band consists of maximum energy?
( a )Conduction
( b )Valance
( c )Forbidden energy
( d )None of the above
Correct Answer (b): Valance
MCQs on Semiconductor: 11 to 15
11 The conduction bond is empty in
( a )Semiconductor
( b )Conductor
( c )Insulator
( d )Both (a) and (b)
Correct Answer (c): Insulator
12 The forbidden energy gap in the insulator is
( a )1 eV
( b )8 eV
( c )200 eV
( d )1000 eV
Correct Answer (b): 8 eV
13 The conduction gap and valance band overlap in the
( a )Conductor
( b )Semiconductor
( c )Insulator
( d )All of the above
Correct Answer (a): Conductor
14 Which of the following is not trivalent impurity?
( a )Galium
( b )Boron
( c )Indium
( d )Arsenic
Correct Answer (d): Arsenic
15 At absolute zero temperature, the semiconductor behaves as
( a )Conductor
( b )Insulator
( c )Super conductor
( d )None of the above
Correct Answer (b): Insulator
MCQs on Semiconductor: 16 to 20
16 The semiconductor has _____ temperature coefficient of resistance.
( a )Positive
( b )Negative
( c )Flat
( d )Any of the above
Correct Answer (b): Negative
17 As the temperature increases, the resistance of the semiconductor material
( a )Decreases
( b )Increases
( c )Becomes zero
( d )Does not affect
Correct Answer (a): Decreases
18 The missing electron in the covalent bond is
( a )Hole
( b )Electron
( c )Free electron
( d )None of the above
Correct Answer (a): Hole
19 The hole consists of
( a )Positive charge
( b )Negative charge
( c )Neutral
( d )None of the above
Correct Answer (a): Positive charge
20 The semiconductor material in pure form is known as
( a )Extrinsic
( b )Intrinsic
( c )Doping
( d )None of the above
Correct Answer (b): Intrinsic
Theories on Semiconductor Materials
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