JEE Main 2025 — Electromagnetic Waves Question with Solution
From: JEE Main 2025 (Online) 29th January Evening Shift
Question
A plane electromagnetic wave propagates along the + x direction in free space. The components of the electric field, and magnetic field, vectors associated with the wave in Cartesian frame are
Choose an option
Show full solutionCorrect option: C
Step-by-step explanation
We know, for a plane electromagnetic wave,
Given, (+ x direction)
So,
i.e.
So,
As, and are unit vectors in the directions of x, y and z axes respectively.
Hence, option 3 is correct.
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Electromagnetic Waves chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
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.