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Friday, 9 October

NEET UG 2020 · Physics · Question 171

NEET 2020 Physics, question 171

Question 171 of the NEET 2020 paper (code E1) is a Physics question from Magnetism and Matter. Its idea, Susceptibility and Permeability, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 1.

Updated 2026-10-08

Q171 · Physics

An iron rod of susceptibility 599 is subjected to a magnetising field of 1200 A m−1^{-1}. The permeability of the material of the rod is :

(μ0=4π×10−7\mu_0 = 4\pi\times10^{-7} T m A−1^{-1})

  1. 12.4π×10−42.4\pi\times10^{-4} T m A−1^{-1}Official answer
  2. 28.0×10−58.0\times10^{-5} T m A−1^{-1}
  3. 32.4π×10−52.4\pi\times10^{-5} T m A−1^{-1}
  4. 42.4π×10−72.4\pi\times10^{-7} T m A−1^{-1}

Official answer: option 1 · NTA final answer key

Same idea

The only question on Susceptibility and Permeability

No other NEET paper from 2017–2026 tested this exact idea.

Susceptibility and Permeability: every question and how it was framed

The chapter

Magnetism and Matter in ten years of NEET

8 questions from 2017–2026, asked in 6 of 10 papers, about 0.8 a paper. Magnetism and Matter alone had 8.

Chapter analysisStudy this chapterPractise this chapter

Magnetism and Matter: questions per paper

0241’171’181’191’200’210’221’233’240’250’26