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Transformers
A certain transformer has a turns ratio of 1 and a 0.85 coefficient of coupling. When 2 V ac is applied to the primary, the secondary voltage is
1 V
1.7 V
0.85 V
0 V
1 V
1.7 V
0.85 V
0 V
Answer
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Related Question
Transformers
Open circuit test on transformers is conducted to determine
eddy current losses
copper losses
core losses
hysteresis losses
eddy current losses
copper losses
core losses
hysteresis losses
Answer
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Transformers
The maximum load that a power transformer can carry is limited by its
copper loss
voltage ratio
temperature rise
dielectric strength of oil
copper loss
voltage ratio
temperature rise
dielectric strength of oil
Answer
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Transformers
In an auto transformer, the primary and secondary are _____ coupled.
Only magnetically
None of the listed here
Only electrically
Magnetically as well as electrically
Only magnetically
None of the listed here
Only electrically
Magnetically as well as electrically
Answer
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Transformers
The all day efficiency of a transformer is also called its
Power efficiency
None of the listed here
Current efficiency
Energy efficiency
Power efficiency
None of the listed here
Current efficiency
Energy efficiency
Answer
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Transformers
Natural oil cooling is used for transformers up to a rating of
3000 kVA
500 kVA
1000 kVA
250 kVA
3000 kVA
500 kVA
1000 kVA
250 kVA
Answer
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