Home Physics Electromagnetic Induction NEET Previous Year Question - EM Induction and AC In an electrical circuit and ac voltage sou…
Physics Electromagnetic Induction NEET Previous Year Question - EM Induction and AC MCQ (Single Correct)

In an electrical circuit and ac 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

A
B
C
1
D

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The correct answer is:
C

When is removed, the phase difference between the voltage and current is

or or

When is removed, the phase difference between the voltage and current is

or

As , the series circuit is in resonance. Impedance of the circuit,

Power factor,

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