DGVCL Exam Paper (12-06-2016)
What would happen if a power transformer designed for operation on 50 Hz (frequency) were connected to a 500 Hz (frequency) source of the same voltage:

Current will be too much high
Eddy Current and Hysteresis losses will be excessive
Transformer may start to smoke and burn
No effect

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DGVCL Exam Paper (12-06-2016)
What will happen if the primary of a transformer is connected to DC supply?

Transformer may start to smoke and burn
Transformer will operate with low efficiency
Transformer will operate with high efficiency
No effect

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DGVCL Exam Paper (12-06-2016)
You should choose Sleep option when

You finish working and are going to bed.
When computer gets hanged frequently. Let it sleep for some time.
The computer is tired after working for the whole day.
You are leaving for a very short time and want to resume your work shortly.

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