Learn

Friday, 9 October

JEE Main 2021 · PhysicsMultiple choiceDiagram basedEasyApplication

JEE Main 16 March 2021, Shift 2, Physics Q13

Question 13 of 90 in this shift, Physics question 13 of 30, Section A.

A bimetallic strip consists of metals A and B. It is mounted rigidly as shown. The metal A has higher coefficient of expansion compared to that of metal B. When the bimetallic strip is placed in a cold bath, it will :

The figure, in words

Vertical bimetallic strip fixed rigidly at its lower end on a base; metal A is on the left and metal B on the right.
  1. (1)Bend towards the right
  2. (2)Bend towards the leftOfficial answer
  3. (3)Not bend but shrink
  4. (4)Neither bend nor shrink

Official answer

Option 2

NTA final key.

Chapter
Thermal Properties of Matter
Topic
Thermal Expansion
Idea tested
Bimetallic Strips

Same topic in other shifts

All Thermal Expansion questions
  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
  2. 5 Apr 2026, Shift 2 · Q34An ideal gas at pressure PP and temperature TT is expanding such that PT3PT^3 = constant. The coefficient of volume expansion of the gas…MediumSingle correct
  3. 4 Apr 2025, Shift 2 · Q31Consider a rectangular sheet of solid material of length l=9l=9 cm and width d=4d=4 cm. The coefficient of linear expansion is…MediumSingle correct
  4. 8 Apr 2023, Shift 2 · Q52A steel rod of length 1 m and cross sectional area 10−410^{-4} m2^2 is heated from 0∘0^\circC to 200∘200^\circC without being allowed to…EasyNumerical value
  5. 25 Jul 2022, Shift 1 · Q54A unit scale is to be prepared whose length does not change with temperature and remains 2020 cm, using a bimetallic strip made of brass…EasyNumerical value
  6. 2 Apr 2017 (offline) · Q9An external pressure P is applied on a cube at 0°C so that it is equally compressed from all sides. K is the bulk modulus of the material…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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.