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Friday, 9 October

NEET UG 2020 · Physics · Question 161

NEET 2020 Physics, question 161

Question 161 of the NEET 2020 paper (code E1) is a Physics question from Mechanical Properties of Solids. Its idea, Young's Modulus Calculation, was asked twice, in 2018 and 2020, across NEET 2017–2026. The NTA final answer key gives option 4.

Updated 2026-10-08

Q161 · Physics

A wire of length L, area of cross section A is hanging from a fixed support. The length of the wire changes to L1L_1 when mass M is suspended from its free end. The expression for Young's modulus is :

  1. 1MgL1AL\frac{MgL_1}{AL}
  2. 2Mg(L1−L)AL\frac{Mg(L_1-L)}{AL}
  3. 3MgLAL1\frac{MgL}{AL_1}
  4. 4MgLA(L1−L)\frac{MgL}{A(L_1-L)}Official answer

Official answer: option 4 · NTA final answer key

Same idea

Young's Modulus Calculation, in other papers

NEET asked this idea twice, in 2018 and 2020. The other question below.

  • 2018 Q44Two wires are made of the same material and have the same volume. The first wire has cross-sectional area A and the second wire has…Numerical · Medium

Young's Modulus Calculation: every question and how it was framed

The chapter

Mechanical Properties of Solids in ten years of NEET

7 questions from 2017–2026, asked in 7 of 10 papers, about 0.7 a paper. Elasticity alone had 7.

Mechanical Properties of Solids: questions per paper

0241’171’181’191’200’211’221’231’240’250’26