JEE Main 2025 — Electromagnetic Waves Question with Solution
From: JEE Main 2025 (Online) 28th January Morning Shift
Question
Due to presence of an em-wave whose electric component is given by a cylinder of length 200 cm holds certain amount of em-energy inside it. If another cylinder of same length but half diameter than previous one holds same amount of em-energy, the magnitude of the electric field of the corresponding em-wave should be modified as
Choose an option
Show full solutionCorrect option: C
Step-by-step explanation
We know,
Energy density
Given that,
Hence, option (3) is correct.
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This is a previous-year question from JEE Main 2025, covering the Electromagnetic Waves 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.