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TRANSFORMERS

Transformers
Short circuit test of a transformer helps us to find its

None of the listed here
Cu loss at no load
Iron loss
Full load cu loss

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Transformers
The power efficiency of a lightning transformer is always ______its all day efficiency.

Equal to
None of the listed here
Less than
Higher than

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Transformers
The mutual flux in a transformer remains constant at all loads because ______

Leakage flux is small
Applied voltage and frequency are constant
Losses are small
Iron core is used

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Transformers
The effect of leakage flux in a transformer is to ______

Decreases copper losses
Cause voltage drop in the windings
Increase copper losses
None of the listed here

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Transformers
Two things which are same for primary and secondary of transformer are ______

Resistance and leakage reactances
Currents and induced voltages
Ampere turns and voltage per turns
None of the listed here

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