DGVCL Exam Paper (12-06-2016)
GUVNL is:

Gujarat Urja Vyapar Nigam Limited
Gujarat Urja Vikas Nigam Limited
None of these
Gujarat Urja Vikas Nikash Limited

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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:

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

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