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Transformers

Transformers
A step up transformer increases

Frequency
Current
Voltage
Power

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Transformers
The transformer that should never the secondary open circuited when primary is energised is _______

Voltage transformer
Power transformer
Auto transformer
Current transformer

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Transformers
Burden of a current transformer is usually expressed in

Amperes
Kilowatt
Volts
Volt amperes

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Transformers
Which of the following insulating materials can withstand the highest temperature safely?

Cellulose
Glass fibre
Mica
Asbestos

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Transformers
In which of the following transformer part of primary winding also serves as the secondary winding?

Potential transformer
Current transformer
Auto transformer
Step-up transformer

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Transformers
In a transformer the resistance between its primary and secondary is

1 ohm
1000 ohms
Infinite
Zero

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