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Saturday, 31 October

JEE Main 2025 · PhysicsMultiple choiceSingle correctEasyApplication

JEE Main 2 April 2025, Shift 2, Physics Q35

Question 35 of 75 in this shift, Physics question 10 of 25, Section A.

If μ0\mu_0 and ϵ0\epsilon_0 are the permeability and permittivity of free space, respectively, then the dimension of (1μ0ϵ0)\left(\frac{1}{\mu_0\epsilon_0}\right) is :
  1. (1)L/T2L/T^2
  2. (2)T2/LT^2/L
  3. (3)T2/L2T^2/L^2
  4. (4)L2/T2L^2/T^2Official answer

Official answer

Option 4

NTA final key.

Chapter
Units and Measurements
Topic
Coulomb's Law
Idea tested
Dimensional Analysis of Permittivity

Same idea in other shifts

Asked 3× in all
  1. 8 Apr 2024, Shift 2 · Q31If ϵ0\epsilon_0 is the permittivity of free space and E is the electric field, then ϵ0E2\epsilon_0 E^2 has the dimensions :EasySingle correct
  2. 8 Apr 2023, Shift 1 · Q46Dimension of 1μ0ϵ0\frac{1}{\mu_0 \epsilon_0} should be equal toEasySingle 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.