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MHT CET 2023 Physics question

PhysicsAlternating CurrentMHT CET 2023

The power factor of an R-L circuit , If the frequency of AC is doubled the power factor will now be

Answer: (B)

Solution

Power factor of a series R-L circuit: . Given , we get , so . When the frequency is doubled, also doubles: . New power factor

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Question ID VK-098134