In an LCR circuit, at resonance, the value of the power factor is:
Show Hint
- 1
- 0
- 0.5
- 0.75
- infinity
The Correct Option is A
Solution and Explanation
Step 1: At resonance in an LCR circuit, the impedance is purely resistive, meaning the total reactance (inductive and capacitive) is zero.
Step 2: The power factor \( {pf} \) in an LCR circuit is given by: \[ {Power Factor} = \cos \theta \] At resonance, \( \theta = 0^\circ \), hence: \[ {Power Factor} = \cos 0^\circ = 1 \] Thus, the power factor at resonance is 1.
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