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Transformers
A transformer transfers electrical energy from primary to secondary usually with a change in ______
Power
Voltage
Frequency
Time period
Power
Voltage
Frequency
Time period
Answer
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Related Question
Transformers
The voltage transformation ratio of a transformer is equal to the ratio of
primary turns to secondary turns
secondary current to primary current
secondary induced e.m.f. to primary induced e.m.f.
secondary terminal voltage to primary applied voltage
primary turns to secondary turns
secondary current to primary current
secondary induced e.m.f. to primary induced e.m.f.
secondary terminal voltage to primary applied voltage
Answer
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Transformers
The path of the magnetic flux in transformer should have
low resistance
high resistance
high reluctance
low reactance
low resistance
high resistance
high reluctance
low reactance
Answer
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Transformers
The flux in the core of a single phase transformer is _____
Partly alternating and partly rotating
Purely alternating one
None of the listed here
Purely rotating one
Partly alternating and partly rotating
Purely alternating one
None of the listed here
Purely rotating one
Answer
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Transformers
The noise resulting from vibrations of laminations set by magnetic forces, is termed as
Boo
Magnetostriction
Zoom
Hum
Boo
Magnetostriction
Zoom
Hum
Answer
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Transformers
When secondary of a current transformer is open-circuited its iron core will be
none of above will happen
hot because primary will carry heavy current
hot because of heavy iron losses taking place in it due to high flux density
cool as there is no secondary current
none of above will happen
hot because primary will carry heavy current
hot because of heavy iron losses taking place in it due to high flux density
cool as there is no secondary current
Answer
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