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TRANSFORMERS

Transformers
The output current corresponding to the maximum efficiency for a transformer having core loss of 200 W and equivalent resistance referred to secondary of 0.5 Ω is

20 A
10 A
15 A
5 A

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Transformers
A step up transformer increases

Voltage
Frequency
Power
Current

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Transformers
A tap changer is used on a transformer for

None of the listed here
Adjustments in secondary voltage
Adjustment in primary voltage
Adjustment in both primary and secondary

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Transformers
Which of the following is not a fitting on a transformer?

Buchholz's relay
Conservator
Commutator
Breather

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Transformers
Burden of a current transformer is usually expressed in

Volts
Amperes
Volt amperes
Kilowatt

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