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

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

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DGVCL Exam Paper (11-12-2011)
Distribution transformers have good all day efficiency due to

Low copper loss
Low copper as well as iron loss
Low voltage
Low iron loss

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