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

Current is maximum and power factor is unity
Current is maximum and power factor is 0.5
Current is minimum and power factor is unity
Current is minimum 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 circuit breaker-open isolator-close earthing switch
Open isolator close circuit breaker-open earthing switch
Close circuit breaker-close isolator - open earthing switch
Close earthing switch - open ciruit- breaker-open islotor

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