JEE Main 2023PhysicsElectromagnetic WavesEasyMCQ

JEE Main 2023 — Electromagnetic Waves Question with Solution

JEE Main 2023 (01 Feb Shift 2)

Question

The ratio of average electric energy density and total average energy density of electromagnetic wave is:

Choose an option

Show full solutionCorrect option: D
Correct answer
D12

Step-by-step explanation

Average electric energy density is stated as uE=12ε0E2

Total average energy density U= 12ε0E2+12μ0B2

=12ε0E2+12μ0E2c2    (As B=Ec)

=12ε0E2+12μ0E2ε0μ0=12ε0E2+12E2ε0=ε0E2

Hence, the ratio, uEU=12.

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 2023, 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.