JEE Main 2025 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 8 April 2025, Shift 2, Physics Q32

Question 32 of 75 in this shift, Physics question 7 of 25, Section A.

Water falls from a height of 200 m into a pool. Calculate the rise in temperature of the water assuming no heat dissipation from the water in the pool. (Take

g = 10\ \mathrm{m/s^2}

, specific heat of water = 4200 J/(kg K))

(1)0.23 K
(2)0.48 KOfficial answer
(3)0.14 K
(4)0.36 K

Official answer

Option 2

NTA final key.

Chapter: Thermal Properties of Matter
Topic: Calorimetry
Idea tested: Mechanical Equivalent of Heat

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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.