Series LCR Circuit – Power Factor

2020 1 question

1. 1 Alternating Current Hard
   A series LCR circuit is connected to an ac voltage source. When $L$ is removed from the circuit, the phase difference between current and voltage is $\frac{\pi}{3}$. If instead $C$ is removed from the circuit, the phase difference is again $\frac{\pi}{3}$ between current and voltage. The power factor of the circuit is:
   A 0.5 B 1 C -1 D zero
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