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Electronics and Communications TNPSC Group 1 Questions
TNPSC Group 1 SYLLABUS
Physics
Nature of Universe
General Scientific Laws
Mechanics and Properties of Matter
Force, Motion and Energy
Everyday application of the basic principles of Mechanics
Electricity and Magnetism
Light, Sound and Heat
Nuclear Physics and Laser
Electronics and Communications
Electronics and Communications MCQ Questions
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7.
Electronic devices that convert D.C. power into A.C. power are called
A.
Converters
B.
Transformer
C.
Inverters
D.
Rectifiers
😑
View Answer
Rough Work
Error
ANSWER
:
C. Inverters
8.
Which of the following is an insulator?
A.
Aluminium
B.
Copper
C.
Glass
D.
Silver
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View Answer
Rough Work
Error
ANSWER
:
C. Glass
9.
A transformer
A.
transforms energy
B.
transforms frequency
C.
transform voltage
D.
generates induced e.m.f.
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View Answer
Rough Work
Error
ANSWER
:
D. generates induced e.m.f.
10.
Can D.C. voltage be used in a transformer
A.
yes
B.
no
C.
some times
D.
None of these
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View Answer
Rough Work
Error
ANSWER
:
B. no
11.
In a step-up transformer, the number of turns
A.
in the primary is more than the secondary
B.
in the secondary is more than in the primary
C.
is same both in the primary and the secondary
D.
None of these
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View Answer
Rough Work
Error
ANSWER
:
B. in the secondary is more than in the primary
12.
Two wires have their lengths,diameters and resistivities, all in the ratio of 1:2. If the resistance of the thinner wire is 10ohms,the resistance of the thicker wire shall be
A.
5 ohms
B.
10 ohms
C.
20 ohms
D.
40 ohms
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View Answer
Rough Work
Error
ANSWER
:
B. 10 ohms
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