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Transformers

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

Hysteresis
Copper
Eddy current
Friction

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Transformers
By laminating the core of a transformer, we decrease _____

Eddy current loss
Hysteresis loss
Copper loss
Leakage reactance

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Transformers
The power transformer is a constant

Current device
Voltage device
Main flux device
Power device

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Transformers
For the parallel operation of single phase transformers it is necessary that they should have

same number of turns on the secondary side.
same polarity
same kVA rating
same efficiency

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Transformers
In a certain loaded transformer, the secondary voltage is one-fourth the primary voltage. The secondary current is

one-fourth the primary current and equal to the primary current
one-fourth the primary current
four times the primary current
equal to the primary current

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Transformers
The maximum flux produced in the core of a transformer is ______

None of the listed here
Directly proportional to supply frequency
Inversely proportional to supply frequency
Inversely proportional to primary voltage

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