STANDARD Physics Power Factor MCQ Question
In an electrical circuit, R, L, C and ac voltage source are all connected in series. When L is removed from the circuit, the phase difference between the voltage and the current in the circuit is π/3. If instead, C is removed from the circuit, the phase difference is again π/3. The power factor of the circuit is
1/2
1/√2
1
√3/2
Correct Answer
Detailed Explanation
When L is removed, the circuit becomes an RC circuit. When C is removed, it becomes an RL circuit. In both cases, the phase difference is π/3, indicating that the impedance is purely resistive, leading to a power factor of 1.
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