JEE Main 2025 · PhysicsMultiple choiceSingle correctMediumMulti-step

JEE Main 2 April 2025, Shift 2, Physics Q27

Question 27 of 75 in this shift, Physics question 2 of 25, Section A.

Given a charge

q

, current

I

and permeability of vacuum

\mu_0

. Which of the following quantity has the dimension of momentum ?

(1) $q\mu_0 / I$
(2) $q^2\mu_0 I$
(3) $qI/\mu_0$
(4) $q\mu_0 I$ Official answer

Official answer

Option 4

NTA final key.

Chapter: Units and Measurements
Topic: Biot-Savart Law
Idea tested: Dimensions of Permeability

Same idea in other shifts

Asked 3× in all

26 Aug 2021, Shift 2 · Q1Match List - I with List - II : List - I List - II (a) Magnetic Induction (i) $\mathrm{ML^2T^{-2}A^{-1}}$ (b) Magnetic Flux (ii)…MediumMatch the list
27 Aug 2021, Shift 1 · Q5Which of the following is not a dimensionless quantity ?EasySingle correct

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 108 of the 174 JEE Main shifts held from 2017 to 2026.