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Transformers

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

Eddy current
Copper
Friction
Hysteresis

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Transformers
The winding of the transformer with greater number of turns will be _____

Either high or low voltage winding
Low voltage winding
High voltage winding
None of the listed here

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Transformers
Which of the following acts as a protection against high voltage surges due to lightning and switching?

Thermal overload relays
Breather
Conservator
Horn gaps

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Transformers
A step up transformer increases

Voltage
Current
Frequency
Power

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

Turn ratio
Copper losses
Total equivalent leakage reactance
Total equivalent resistance

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Transformers
The maximum efficiency of a distribution transformer is

at 50% full load
at full load
at no load
at 80% full load

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