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Friday, 9 October

JEE Main 2024 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 9 April 2024, Shift 1, Physics Q53

Question 53 of 90 in this shift, Physics question 23 of 30, Section B.

Two persons pull a wire towards themselves. Each person exerts a force of 200200 N on the wire. Young's modulus of the material of wire is 1×1011 N m−21\times10^{11}\ \mathrm{N\,m^{-2}}. Original length of the wire is 22 m and the area of cross section is 2 cm22\ \mathrm{cm^2}. The wire will extend in length by ________ μ\mum.

Official answer

20

NTA final key.

Idea tested
Elastic Moduli

Same idea in other shifts

Asked 13× in all
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  2. 5 Apr 2026, Shift 1 · Q31The Young's modulus of steel wire of radius rr and length LL is YY. If the radius rr and length LL of the wire are doubled then the…EasySingle correct
  3. 5 Apr 2026, Shift 1 · Q46A cube has side length 5 cm and modulus of rigidity 105 N/m210^5\ \mathrm{N/m^2}. The displacement produced by a force of 10 N in the upper face…EasyNumerical value
  4. 6 Apr 2026, Shift 2 · Q33Figure represents the extension (Δl\Delta l) of a wire of length 1 meter, suspended from the ceiling of the room at one end with a load…EasySingle correctHas a figure
  5. 4 Apr 2025, Shift 2 · Q32A cylindrical rod of length 1 m and radius 4 cm is mounted vertically. It is subjected to a shear force of 10510^5 N at the top.…MediumSingle correct
  6. 7 Apr 2025, Shift 1 · Q32Two wires A and B are made of same material having ratio of lengths LALB=13\frac{L_A}{L_B} = \frac{1}{3} and their diameters ratio…EasySingle correct
  7. 8 Apr 2025, Shift 2 · Q48A sample of a liquid is kept at 1 atm. It is compressed to 5 atm which leads to change of volume of 0.8 cm3^3. If the bulk modulus of the…EasyNumerical value
  8. 25 Jul 2022, Shift 1 · Q53A wire of length LL and radius rr is clamped rigidly at one end. When the other end of the wire is pulled by a force FF, its length…MediumNumerical value

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 42 of the 174 JEE Main shifts held from 2017 to 2026.