DGVCL Exam Paper (11-12-2011)
In a series RLC circuit at resonance

Current is minimum and power factor is 0.5
Current is minimum and power factor is unity
Current is maximum and power factor is unity
Current is maximum and power factor is 0.5

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DGVCL Exam Paper (11-12-2011)
Which of the following correctly represents the sequence of operations of isolator, circiut breaker and earthing switch while opening a circuit?

Open isolator close circuit breaker-open earthing switch
Close circuit breaker-close isolator - open earthing switch
Close earthing switch - open ciruit- breaker-open islotor
Open circuit breaker-open isolator-close earthing switch

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DGVCL Exam Paper (11-12-2011)
Two parallel conductors are carrying the current in the same direction. Which of the following statements is correct?

There is a repelling force between the conductors
The force increases when the distance between the conductors is decreased
The force increases when the distance between the conductors is increased
There is an attracting force between the conductors

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