STANDARDPhysics-Alternating Current
STANDARD Physics Power Factor MCQ Question
Type: MCQ-conceptual-Medium-Class 12
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
A
1/2
B
1/√2
C
1
D
√3/2
Correct Answer
Option C
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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