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Online Tests
Ics Part 2 Physics Chapter 7 Test Online MCQs With Answers
Question # 1
A.C. can be converted into D.C. by
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An oscillator
Detector
An amplifier
Rectifier
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Question # 2
In photovoltaic cell, current is directly proportional to.
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Wavelength of light
Intensity of light
Energy
Frequency of light
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Question # 3
Base of transistor is of order:
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10
-11
m
10
6
m
10
-8
m
10
-6
m
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Question # 4
An expression for gain of an inverting amplifier is
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(R
1
R
2
)
None of these
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Question # 5
Light emitting diodes are made from semiconductors.
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Silicon
Germanium
Carbon
Gallium arsenide
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Question # 6
The potential difference across depletion region in case of Si is
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0.6 volt
0.9 volt
0.7 volt
0.2 volt
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Question # 7
The resistance between the inverting (-) and non inverting inputs is called Input resistance and is the order of.
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Ohms
Kilo Ohms
Mega Ohms
Thounds Ohms
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Question # 8
LDR becomes necessary when op amp is used as a
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Night switch
Inverter
Comparator
Rectifier
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Question # 9
The average gap for Germanium at 0K is
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1.12 ev
0.02 ev
6.72 ev
7.2 ev
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Question # 10
Automatic function of street light can be done by the use of.
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Inductor
Rectifier
Comparator
emf
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Question # 11
The p-n junction in which p side is connected to+ive and n-side is -ve the junction is said to be:
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Neutral
Forward biased
Reversed biased
None of above
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Question # 12
Reverse current flows due to
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Majority charge carriers
Minority charge carriers
Electrons
Holes
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Question # 13
the number of terminals in a semiconductor diode are
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2
3
4
5
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Question # 14
For rectification we use.
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Transformer
Diode
Choke
Generator
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Question # 15
The semi conductor diode has the property of
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Two way conduction
Zero conduction
One way conduction
Amplification
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Question # 16
The sensor of light is.
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Transistor
LED
Diode
Light dependent resistance
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Question # 17
The output voltage of a rectifier is.
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Smooth
Pulsating
Alternating
Per featly direct
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Question # 18
The P.D develop in case of germanium is:
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0.3
0.7
0.5
0.9
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