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ECAT Physics Chapter 18 Electronics Online Test MCQs With Answers
Question # 1
An electronic computer is basically a vast arrangement of electronic switches which are made from
Choose an answer
Resistors
Transistors
N -type crystals
P-Type crystals
Capacitors
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Question # 2
All the valence electrons present in a crystal of silicon are bound in their orbits by
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Ionic bond
covalent bond
Molecular bond
Both (A) and (B)
Both (B) and (C)
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Question # 3
Michael Faraday is known by his work on
Choose an answer
Nuclear strong force
Gravitational force
Nuclear weak force
Electric force
None of these
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Question # 4
In AND gate, the output is 1 if:
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Both inputs are 0
Both inputs are 1
Only one input is 0
Both (A) and (B)
Both (A) and (C)
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Question # 5
To display a digit of EIGHT, the number of ON LED'S are:
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Two
Three
Five
Seven
Eight
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Question # 6
A digital system deals with quantities which has discrete values:
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Two in number
One in number
Three in number
Four in number
None of these
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Question # 7
The reverse saturation current in a PN junction diode is only due to
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Majority carriers
Minority Carriers
Acceptor ions
Donor ions
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Question # 8
The use of chips in electrons is described in the form of:
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Yellow boxes
Black boxes
Red boxes
White boxes
Orange boxes
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Question # 9
The value of relative permittivity of different dielectrics are
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Equal
Different
Greater than one
Smaller than one
Both B and C
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Question # 10
In describing function of digital systems, 1 represents:
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Closed switch
True Statement
Lighted bulb
Only (B) and (C)
All are true
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Question # 11
To make an LED, it is impreacticable to use:
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Silicon
Gallium arsenide
Gallium arsenide phosphide
Iron
Both (B) and (C)
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Question # 12
Electric field strength is defined as
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Work done on unit charge
Force exerted on unit charge
Distance covered by unit charge
Power exerted by unit charge
None of these
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