JEE Main 2025 — Electromagnetic Waves Question with Solution
JEE Main 2025 (7 Apr Shift 2)
Question
The unit of is :
(I = intensity of an electromagnetic wave, speed of light)
(I = intensity of an electromagnetic wave, speed of light)
Choose an option
Show full solutionCorrect option: D
Correct answer
D
Step-by-step explanation
$\begin{aligned}
& \mathrm{I}=\frac{1}{2} \epsilon_0 \mathrm{E}_0^2 \times \mathrm{C} \\ & \mathrm{E}_0=\sqrt{\frac{2 \mathrm{I}}{\epsilon_0 \mathrm{C}}}
\end{aligned}E_0$ : electric field N/C
& \mathrm{I}=\frac{1}{2} \epsilon_0 \mathrm{E}_0^2 \times \mathrm{C} \\ & \mathrm{E}_0=\sqrt{\frac{2 \mathrm{I}}{\epsilon_0 \mathrm{C}}}
\end{aligned}E_0$ : electric field N/C
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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.