In an ac circuit, the power factor - Vidyadip

MCQ

In an ac circuit, the power factor

A
Is zero when the circuit contains an ideal resistance only
B
Is unity when the circuit contains an ideal resistance only
C
$1s$ zero when the circuit contains an ideal inductance only
✓
Is unity when the circuit contains an ideal inductance only

✓

Answer

Correct option: D.

Is unity when the circuit contains an ideal inductance only

$X_L=2 \pi v L \Rightarrow L=\frac{X_L}{2 \pi v}=\frac{50}{2 \times 3.14 \times 50}=0.16 \mathrm{H}$

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