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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
Step-up transformer
Auto transformer
Current transformer
Potential transformer
Step-up transformer
Auto transformer
Answer
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Related Question
Transformers
What is the approximate efficiency of large transformers?
65%
85%
75%
95 %
65%
85%
75%
95 %
Answer
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Transformers
If a transformer core has air gaps, then, _________
Eddy current is increased
Magnetising current is greatly increased
Hysteresis loss is decreased
Reluctance of magnetic path is decreased
Eddy current is increased
Magnetising current is greatly increased
Hysteresis loss is decreased
Reluctance of magnetic path is decreased
Answer
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Transformers
The primary winding of a transformer has 110 V ac across it. What is the secondary voltage if the turns ratio is 8?
88 V
8.8 V
8,800 V
880 V
88 V
8.8 V
8,800 V
880 V
Answer
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Transformers
The maximum efficiency of a distribution transformer is
at full load
at 50% full load
at no load
at 80% full load
at full load
at 50% full load
at no load
at 80% full load
Answer
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Transformers
The primary leakage flux links _____
None of the listed here
Primary winding only
Secondary winding only
Both primary and secondary windings
None of the listed here
Primary winding only
Secondary winding only
Both primary and secondary windings
Answer
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