A metallic bar of Young's modulus, 0.5×10^11 N m^-2 and coefficient of linear thermal expansion 10^-5 °C^-1, length 1 m and area of cross-section 10^-3 m^2 is heated from 0°C to 100°C without expansion or bending. The compressive force developed in it is:

NEET UG 2024 · Physics · Question 42

NEET 2024 Physics, question 42

Question 42 of the NEET 2024 paper (code T2) is a Physics question from Thermal Properties of Matter. Its idea, Linear Thermal Expansion, was asked twice, in 2019 and 2024, across NEET 2017–2026. The NTA final answer key gives option 4.

Updated 2026-10-08

Q42 · Physics

0.5\times10^{11}

100\times10^3

Official answer: option 4 · NTA final answer key

Same idea

Linear Thermal Expansion, in other papers

NEET asked this idea twice, in 2019 and 2024. The other question below.

2019 Q 14 A copper rod of 88 cm and an aluminium rod of unknown length have their increase in length independent of increase in temperature. The\dots Numerical \cdot Easy

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The chapter

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10 questions from 2017–2026, asked in 8 of 10 papers, about 1.0 a paper. Heat Transfer and Thermal Expansion alone had 8.

Chapter analysis Study this chapter Practise this chapter

Linear Thermal Expansion, in other papers

Thermal Properties of Matter in ten years of NEET

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