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Friday, 9 October

JEE Main 2025 · PhysicsMultiple choiceSingle correctEasyRecall

JEE Main 2 April 2025, Shift 1, Physics Q36

Question 36 of 75 in this shift, Physics question 11 of 25, Section A.

The relationship between the magnetic susceptibility (χ\chi) and the magnetic permeability (μ\mu) is given by : (μ0\mu_0 is the permeability of free space and μr\mu_r is relative permeability)
  1. (1)χ=μr+1\chi=\mu_r+1
  2. (2)χ=1−μμ0\chi=1-\frac{\mu}{\mu_0}
  3. (3)χ=μμ0−1\chi=\frac{\mu}{\mu_0}-1Official answer
  4. (4)χ=μrμ0+1\chi=\frac{\mu_r}{\mu_0}+1

Official answer

Option 3

NTA final key.

Topic
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Idea tested
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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.