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Transformers
The voltage transformation ratio of a transformer is equal to the ratio of
secondary induced e.m.f. to primary induced e.m.f.
primary turns to secondary turns
secondary terminal voltage to primary applied voltage
secondary current to primary current
secondary induced e.m.f. to primary induced e.m.f.
primary turns to secondary turns
secondary terminal voltage to primary applied voltage
secondary current to primary current
Answer
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Related Question
Transformers
The power efficiency of a lightning transformer is always ______its all day efficiency.
Equal to
Higher than
Less than
None of the listed here
Equal to
Higher than
Less than
None of the listed here
Answer
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Transformers
Which of the following parts of a transformer is visible from outside?
Secondary winding
Core
Bushings
Primary winding
Secondary winding
Core
Bushings
Primary winding
Answer
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Transformers
Which of the following 3 phase connections of transformer create disturbances in communication systems
Delta/Star
Star/Star
Delta/Delta
Star/Delta
Delta/Star
Star/Star
Delta/Delta
Star/Delta
Answer
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Transformers
The no load primary current is about ______of full load primary current.
3-5%
15-30%
30-40%
Above 40%
3-5%
15-30%
30-40%
Above 40%
Answer
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Transformers
In which of the following transformer part of primary winding also serves as the secondary winding?
Current transformer
Potential transformer
Auto transformer
Step-up transformer
Current transformer
Potential transformer
Auto transformer
Step-up transformer
Answer
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