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Saturday, 31 October

JEE Main 2021 · PhysicsNumerical answerNumerical valueMediumCalculation

JEE Main 3 August 2021, Shift 1, Physics Q27

Question 27 of 90 in this shift, Physics question 27 of 30, Section B.

Two rods X and Y of identical dimensions are at temperature 40°C. If X is heated upto 200°C and Y is heated upto T°C, then also the new lengths are the same. If the ratio of the coefficients of linear expansion of X and Y is 8 : 10 then the value of T is _________ K.

Official answer

441

NTA final key.

Chapter
Thermal Properties of Matter
Topic
Thermal Expansion
Idea tested
Linear Expansion

Same idea in other shifts

Asked 2× in all
  1. 4 Apr 2026, Shift 2 · Q34The temperature of a metal strip having coefficient of linear expansion α\alpha is increased from T1T_1 to T2T_2 resulting in increase of…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.