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A seriesLCR circuit is connected to an a...

A seriesLCR circuit is connected to an ac voltage source. When L is removed from the circuit, the phase difference between current and voltage is `pi/3`. If instead C is removed from the circuit phase difference is agin `pi/3` between current and voltage. Power factor of circuit is:

A

zero

B

0.5

C

1

D

-1

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