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Transformers

Transformers
A transformer does not posses ______changing property.

Voltage
Current
Impedance
Power

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Transformers
When load on a transformer is increased, the eddy current _____

Remains unchanged
None of the listed here
Is increased
Is decreased

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Transformers
If a power transformer is operated at very high frequencies, then ______

Core losses will be excessive
None of the listed here
Primary will draw large power
Primary reactance is too much increased

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Transformers
Natural air cooling is generally restricted for transformers up to

5 MVA
1.5 MVA
50 MVA
15 MVA

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Transformers
The power transformer is a constant

Main flux device
Voltage device
Current device
Power device

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Transformers
The primary and secondary of a transformer are ______ coupled.

Electrically and magnetically
Electrically
Magnetically
None of the listed here

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