JEE Main 2024PhysicsElectromagnetic WavesHardMCQ

JEE Main 2024 — Electromagnetic Waves Question with Solution

JEE Main 2024 (27 Jan Shift 1)

Question

A plane electromagnetic wave propagating in x-direction is described by
Ey=200 V m-1sin1.5×107t-0.05x; The intensity of the wave is :
(Use ϵ0=8.85×10-12 C2 N-1 m-2)

Choose an option

Show full solutionCorrect option: B
Correct answer
B53.1 W m-2

Step-by-step explanation

The magnitude of the electric field component of the electromagnetic wave is given by

E0=200 V m-1

The formula to calculate the intensity of the electromagnetic wave is given by

I=12ε0cE02   ...1

From equation (1), it follows that

I=12×8.85×10-12×3×108×2002 W m-2=53.1 W m-2

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About this question

This is a previous-year question from JEE Main 2024, 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.