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JEE Main 2025 · PhysicsMultiple choiceSingle correctMediumMulti-step

JEE Main 7 April 2025, Shift 2, Physics Q39

Question 39 of 75 in this shift, Physics question 14 of 25, Section A.

The unit of

\sqrt{\frac{2I}{\epsilon_0 c}}

is : (

I

= intensity of an electromagnetic wave,

c

: speed of light)

(1)Vm
(2) $\mathrm{NC^{-1}}$ Official answer
(3)NC
(4)Nm

Official answer

Option 2

NTA final key.

Chapter: Electromagnetic Waves
Topic: No close match in our taxonomy
Idea tested: No close match in our taxonomy

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.