JEE Main 2019PhysicsElectromagnetic WavesMediumMCQ

JEE Main 2019 — Electromagnetic Waves Question with Solution

JEE Main 2019 (12 Jan Shift 2)

Question

The mean intensity of radiation on the surface of the Sun is about 108W/m2. The rms value of the corresponding magnetic field is closest to:

Choose an option

Show full solutionCorrect option: D
Correct answer
D10-4T

Step-by-step explanation

I=B0 22μ0×C

B0=2μ0IC

Brms=μ0IC=4π×10-7×1083×108

≈10-4 T

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About this question

This is a previous-year question from JEE Main 2019, 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.