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ECAT Physics Chapter 18 Electronics Online Test MCQs With Answers
Question # 1
If both the inputs given to a gate ae 1 such that the output is 0, then it is:
Choose an answer
AND gate
NOR gate
OR gate
NOT gate
Both (A) and (C)
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Question # 2
In describing function of digital systems, 1 represents:
Choose an answer
Closed switch
True Statement
Lighted bulb
Only (B) and (C)
All are true
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Question # 3
In the text book, the transistor amplifier circuit is a:
Choose an answer
Common emitter circuit
Common collector circuit
Common base circuit
Any of these
None of these
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Question # 4
Truth table of logic function:
Choose an answer
Summarizes its output values
Tabulates all its input conditions only
Display all its input/output possibilites
Is not based on logic algebra
None of these
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Question # 5
A potential barrier of 0.7 V exists across p-n junction made from:
Choose an answer
Germanium
Silicon
Arsenic
Gallium
Indium
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Question # 6
The SI unit of charge is
Choose an answer
Ampere
Watt
Coulomb
Volt
Joule
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Question # 7
The use of chips in electrons is described in the form of:
Choose an answer
Yellow boxes
Black boxes
Red boxes
White boxes
Orange boxes
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Question # 8
The number of input terminals of an op-amp is:
Choose an answer
One
Two
Three
Four
None of these
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Question # 9
.Depletion region contains:
Choose an answer
Protons
Positive ions
Negative ions
Both (B) and (C)
Both (A) and (C)
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Question # 10
To turn the transistor OFF, the base current is set:
Choose an answer
At maximum value
At zero
Either (A) or (B)
All are correct
None of correct
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Question # 11
Conversion of A.C. into D.C. is called:
Choose an answer
Reftification
Amplification
Electric induction
Magnetic induction
None of these
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Question # 12
A digital system deals with quantities which has discrete values:
Choose an answer
Two in number
One in number
Three in number
Four in number
None of these
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Question # 13
Inverter is the name given to:
Choose an answer
NOT gate
OR gate
NOR gate
AND gate
XOR gate
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Question # 14
Electric intensity at a place due to a charged conductor is a
Choose an answer
Scalar quantity
Vector quantity
Semi vector and semi scalar
Dimensionless quantity
Both A and D are true
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Question # 15
A hole in p-type my be due to:
Choose an answer
Trivalent impurity
Breking of some covalent bond
Pentavalent impurity
Germanium
Either (A) or (B)
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Question # 16
Improper biasing of a transistor circuit produces
Choose an answer
Heavy loading of emitter current
Distortion in the output signal
Excessive heat at collector terminal
Faulty location of load line
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