JEE Main 2022 · PhysicsNumerical answerNumerical valueMediumMulti-step

JEE Main 28 July 2022, Shift 2, Physics Q23

Question 23 of 90 in this shift, Physics question 23 of 30, Section B.

A string of area of cross-section

4\ \mathrm{mm^2}

and length 0.5 m is connected with a rigid body of mass 2 kg. The body is rotated in a vertical circular path of radius 0.5 m. The body acquires a speed of 5 m/s at the bottom of the circular path. Strain produced in the string when the body is at the bottom of the circle is ______

\times\ 10^{-5}

. (use young's modulus

10^{11}\ \mathrm{N/m^2}

and g =

10\ \mathrm{m/s^2}

)

Official answer

NTA final key.

Chapter: Mechanical Properties of Solids
Topic: Elasticity
Idea tested: Stress and Strain Types

Same idea in other shifts

Asked 8× in all

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.