JEE Main 2020 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 2 September 2020, Shift 2, Physics Q6

Question 6 of 75 in this shift, Physics question 6 of 25.

When the temperature of a metal wire is increased from 0°C to 10°C, its length increases by 0.02%. The percentage change in its mass density will be closest to :

(1)2.3
(2)0.008
(3)0.8
(4)0.06Official answer

Official answer

Option 4

NTA final key (Sep 2020).

Chapter: Thermal Properties of Matter
Topic: Thermal Expansion
Idea tested: Density Variation with Temperature

Same topic in other shifts

All Thermal Expansion questions

4 Apr 2026, Shift 2 · Q34The temperature of a metal strip having coefficient of linear expansion $\alpha$ is increased from $T_1$ to $T_2$ resulting in increase of…MediumSingle correct
5 Apr 2026, Shift 2 · Q34An ideal gas at pressure $P$ and temperature $T$ is expanding such that $PT^3$ = constant. The coefficient of volume expansion of the gas…MediumSingle correct
4 Apr 2025, Shift 2 · Q31Consider a rectangular sheet of solid material of length $l=9$ cm and width $d=4$ cm. The coefficient of linear expansion is…MediumSingle correct
8 Apr 2023, Shift 2 · Q52A steel rod of length 1 m and cross sectional area $10^{-4}$ m $^2$ is heated from $0^\circ$ C to $200^\circ$ C without being allowed to…EasyNumerical value
25 Jul 2022, Shift 1 · Q54A unit scale is to be prepared whose length does not change with temperature and remains $20$ cm, using a bimetallic strip made of brass…EasyNumerical value
25 Jun 2022, Shift 2 · Q34A solid metallic cube having total surface area $24\ \mathrm{m}^2$ is uniformly heated. If its temperature is increased by…MediumSingle 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.