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Online Tests
ECAT Physics Chapter 18 Electronics Online Test MCQs With Answers
Question # 1
A potential barrier of 0.7V exists across p-n junction made from:
Choose an answer
Germanium
Silicon
Arsenic
Gallium
Indium
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Question # 2
Crystal of germanium or silicon in its pure form at absolute zero acts as:
Choose an answer
A conductor
A semiconductor
an insulator
Both (A) and (C)
Both (A) and (B)
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Question # 3
Silicon is one of the mot commonly used:
Choose an answer
onductor
Dielectric
Insulator
Semiconduction
Both (B) and (C)
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Question # 4
In the forward biases situation, the current flowing across the p-n junction is a few:
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amperes
Milli amperes
Micro amperes
Pico amperes
None of these
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Question # 5
Electric field lines emerge from the charges in
Choose an answer
One dimension
Two dimensions
Three dimensions
Four dimensions
None of these
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Question # 6
By placing a dielectric in between the charges, the electrostatic force between them
Choose an answer
Is always reduced
Is always increased
Is not affected
Is increased one million times
None of these
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Question # 7
In the text book, the transistor amplifier circuit is a:
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Common emitter circuit
Common collector circuit
Common base circuit
Any of these
None of these
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Question # 8
The concept of electric field theory was introduced by
Choose an answer
Michael Faraday
Newton
Dalton
Kepler
Einstein
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Question # 9
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 # 10
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 # 11
A transistor has:
Choose an answer
One region
Two regions
Three regions
Four regions
None is correct
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Question # 12
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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