NEET 2012 Physics question
In an electrical circuit , , and an a.c voltage source are all connected in series. When is removed from the circuit, the phase difference between the voltage and the current in the circuit is . If instead, is removed from the circuit, the phase difference is again . The power factor of the circuit is
Answer: (4)
Solution
With removed (series RC circuit): , so . With removed (series RL circuit): , so . Hence in the full RLC circuit, so the net reactance and the
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