JEE Main 2021 — Alternating Current Question with Solution
From: JEE Main 2021 (Online) 20th July Evening Shift
Question
A series LCR circuit of R = 5, L = 20 mH and C = 0.5 F is connected across an AC supply of 250 V, having variable frequency. The power dissipated at resonance condition is ______________ 102 W.
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Show full solutionCorrect answer: 125
Correct answer
125
Step-by-step explanation
XL = XC (due to resonance)
Z = R so
Z = R so
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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.