Question:
The power factor of a purely inductive circuit is
The power factor of a purely inductive circuit is
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Pure inductor has zero lagging power factor.
Updated On: May 27, 2026
- Unity
- Zero lagging
- Zero leading
- One leading
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The Correct Option is B
Solution and Explanation
Concept:
Power factor is:
\[
\cos\phi
\]
Step 1: In a purely inductive circuit, current lags voltage by: \[ 90^\circ \]
Step 2: Therefore: \[ \phi=90^\circ \]
Step 3: Power factor: \[ \cos90^\circ=0 \]
Step 4: Since current lags voltage, it is called zero lagging power factor. Therefore: \[ \boxed{\text{Zero lagging}} \]
Step 1: In a purely inductive circuit, current lags voltage by: \[ 90^\circ \]
Step 2: Therefore: \[ \phi=90^\circ \]
Step 3: Power factor: \[ \cos90^\circ=0 \]
Step 4: Since current lags voltage, it is called zero lagging power factor. Therefore: \[ \boxed{\text{Zero lagging}} \]
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