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Transformers

Transformers
When load on a transformer is decreased, ______loss is decreased

Copper
Friction
Eddy current
Hysteresis

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Transformers
Harmonics in transformer result in

magnetic interference with communication circuits
increased core losses
All of the listed here
increased I2R losses

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Transformers
We can find _______of the transformer with open circuit test.

Copper losses
Turn ratio
Total equivalent leakage reactance
Total equivalent resistance

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Transformers
An open-circuit test on a transformer is conducted primarily to measure

insulation resistance
total loss
core loss
copper loss

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Transformers
A shell-type transformer has

reduced magnetic leakage
negligibly hysteresis losses
None of these
high eddy current losses

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Transformers
When secondary of a current transformer is open-circuited its iron core will be

cool as there is no secondary current
hot because of heavy iron losses taking place in it due to high flux density
none of above will happen
hot because primary will carry heavy current

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