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Friday, 9 October

JEE Main 2025 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 2 April 2025, Shift 2, Physics Q48

Question 48 of 75 in this shift, Physics question 23 of 25, Section B.

The length of a light string is 1.4 m when the tension on it is 5 N. If the tension increases to 7 N, the length of the string is 1.56 m. The original length of the string is __________ m.

Official answer

1

NTA final key.

Chapter
Mechanical Properties of Solids
Topic
Elasticity
Idea tested
Finding Natural Length from Two Tensions

Same idea in other shifts

Asked 2× in all
  1. 29 Jun 2022, Shift 1 · Q36A wire of length L is hanging from a fixed support. The length changes to L1L_1 and L2L_2 when masses 1 kg and 2 kg are suspended…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 42 of the 174 JEE Main shifts held from 2017 to 2026.