JEE Main 2021 — Alternating Current Question with Solution
From: JEE Main 2021 (Online) 27th August Evening Shift
Question
An ac circuit has an inductor and a resistor resistance R in series, such that XL = 3R. Now, a capacitor is added in series such that XC = 2R. The ratio of new power factor with the old power factor of the circuit is . The value of x is ___________.
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Show full solutionCorrect answer: 1
Correct answer
1
Step-by-step explanation
x = 1
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This is a previous-year question from JEE Main 2021, covering the Alternating Current chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.