Hi CUET aspirants, Welcome to Amans Maths Blogs (AMBIPi). In this post, you will get CUET Physics Mock Test Semiconductor Electronics. This CUET Physics Mock Test is of the Physics chapter Semiconductor Electronics. Before solving these CUET Physics questions, you must read CUET Physics Notes, which helps you to revise CUET Physics Syllabus and then you must need to solve CUET Previous Years Questions Papers.
CUET Physics Mock Test
CUET Physics Question No: 1
The majority charge carries in p-type semiconductor are
Option A : Electron
Option B : Protons
Option C : Holes
Option D : Neutrons
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Option C: Holes
In P-type semiconductor, holes are the majority charge carriers.
CUET Exam Physics Question No: 2
A p-type semiconductor can be obtained by adding
Option A : Arsenic to pure silicon
Option B : Gallium to pure silicon
Option C : Antimony to pure germanium
Option D : Phosphorous to pure germanium
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Option B: Gallium to pure silicon
A P-type semiconductor can be obtained by adding Gallium to pure silicon
CUET UG Physics Question No: 3
The valency of an impurity added to germanium crystal in order to convert it into a p-type semiconductor is
Option A : 6
Option B : 5
Option C : 4
Option D : 3
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Option D: 3
The valency is 3 of an impurity
CUET Domain Subject Physics Question No: 4
In a semiconductor. the concentration of electrons is 8 × 1014/cm3 and that of the holes is 5 × 1012/cm3. The semiconductor is
Option A : P-type
Option B : N-type
Option C :– Intrinsic
Option D : PNP-type
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Option B: N-type
Since, ne > nh . The semiconductor is N-type
CUET BSc Physics Question No: 5
The valency of the impurity atom that is to be added to germanium crystal so as to make it a N-type semiconductor is
Option A : 6
Option B : 5
Option C : 4
Option D : 3
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Option B: 5
The valency of the impurity is 5.
CUET Entrance Exam Physics Question No: 6
Silicon is a semiconductor. If a small amount of As is added to it, then its electrical conductivity
Option A : Decreases
Option B : Increases
Option C : Remains unchanged
Option D : Zero
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Option B: Increases
Impurity increases the electrical conductivity.
CUET Exam Question No: 7
To obtain P-type Si semiconductor, we need to dope pure Si with
Option A : Aluminium
Option B : Phosphorous
Option C : Oxygen
Option D : Germanium
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Option A: Aluminium
Aluminium is trivalent impurity
CUET Physics Practice Questions No: 8
A N-type semiconductor is
Option A : Negatively charged
Option B : Positively charged
Option C : Neutral
Option D : None of these
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Option C: Neutral
N-type semiconductors are neutral because neutral atoms are added during doping.
CUET Physics Sample Paper Question No: 9
Semiconductor is damaged by the strong current due to
Option A : Lack of free electron
Option B : Excess of electrons
Option C : Excess of proton
Option D : None of these
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Option B: Excess of electrons
When a strong current passes through the semiconductor it heats up the crystal and covalent bonds are broken. Hence, because of excess number of tree electrons it behaves like a conductor.
CUET Physics Mock Test Question No: 10
PN-junction diode works as an insulator, if connected
Option A : To A.C.
Option B : In forward bias
Option C : In reverse bias
Option D : None of these
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Option C: In reverse bias
In reverse bias no current flows
CUET Physics Question No: 11
The PN-junction diode is used as
Option A : An amplifier
Option B : A rectifier
Option C : An oscillator
Option D : A modulator
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Option B: A rectifier
It is used to convert ac into dc (rectifier)
CUET Exam Physics Question No: 12
In a junction diode, the holes are due to
Option A : Protons
Option B : Neutrons
Option C : Extra electrons
Option D : Missing of electrons
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Option D: Missing of electrons
In a junction diode, the holes are due to missing of electrons.
CUET UG Physics Question No: 13
In PN-junction, avalanche current flows in circuit when biasing is
Option A : Forward
Option B : Reverse
Option C : Zero
Option D : Excess
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Option B: Reverse
At a particular reverse voltage in PN-junction, a huge current flows in reverse direction known as avalanche current.
CUET Domain Subject Physics Question No: 14
Avalanche breakdown is due to
Option A : Collision of minority charge carrier
Option B : Increase in depletion layer thickness
Option C : Decrease in depletion layer thickness
Option D : None of these
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Option A: Collision of minority charge carrier
At high reverse voltage, the minority charge carries acquires very high velocities. These by collision break down the covalent bonds, generating more carriers. This mechanism is called Avalanche breakdown.
CUET BSc Physics Question No: 15
The potential barrier, in the depletion layer, is due to
Option A : Ions
Option B : Holes
Option C : Electrons
Option D : Both (b) and (c
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Option A: Ions
The potential barrier, in the depletion layer, is dul to ions.
CUET Entrance Exam Physics Question No: 16
Function of a rectifier is
Option A : To convert ac into dc
Option B : To convert dc into ac
Option C : Both (a) and (d)
Option D : None of these
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Option A: To convert ac into dc
ac → rectifier → dc
CUET Exam Question No: 17
The maximum efficiency of full wave rectifier is
Option A : 100%
Option B : 25.20%
Option C : 40.2%
Option D : 81.2%
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Option D: 81.2%
For full wave rectifier η = 81.2 / 1 + rf / RL ⇒ η max = 81.2 % (rf < < RL)
CUET Physics Practice Questions No: 18
Zener diode is used as
Option A : Half wave rectifier
Option B : Full wave rectifier
Option C : ac voltage stabilizer
Option D : dc voltage stabilizer
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Option D: dc voltage stabilizer
For a wide range of values of load resistance, the current in the zener diode may change but the voltage across it remains unaffected. Thus the output voltage across the zener diode is a regulated voltage
CUET Physics Sample Paper Question No: 19
When NPN transistor is used as an amplifier
Option A : Electrons move from base to collector
Option B : Holes move from emitter to base
Option C : Electrons move from collector to base
Option D : Holes move from base to emitter
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Option A: Electrons move from base to collector
When NPN transistor is used as an amplifier, majority charge carrier electrons of N-type emitter move from emitter to base and then base to collector
CUET Physics Mock Test Question No: 20
Least doped region in a transistor
Option A : Either emitter or collector
Option B : Base
Option C : Emitter
Option D : Collector
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Option B: Base
In a transistor, base is least doped.
