JEE Main 2026 — Alternating Current Question with Solution
JEE Main 2026 (28 January Shift 2)
Question
An inductor stores 16 J of magnetic field energy and dissipates 32 W of thermal energy due to its resistance when an a.c. current of 2 A (rms) and frequency 50 Hz flows through it. The ratio of inductive reactance to its resistance is .
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Show full solutionCorrect answer: 314
Correct answer
314
Step-by-step explanation
Given: Magnetic field energy J, Thermal power dissipated W, A, Hz.
From energy stored in inductor:
From thermal power dissipated:
Inductive reactance:
From energy stored in inductor:
From thermal power dissipated:
Inductive reactance:
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This is a previous-year question from JEE Main 2026, 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.