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Friday, 9 October

JEE Main 2026 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 2 April 2026, Shift 1, Physics Q50

Question 50 of 75 in this shift, Physics question 25 of 25, Section B.

A tub is filled with water and a wooden cube 10 cm×10 cm×10 cm10\ \mathrm{cm}\times10\ \mathrm{cm}\times10\ \mathrm{cm} is placed in the water. The wooden cube is found to float on the water with a part of it submerged in water. When a metal coin is placed on the wooden cube, the submerged part is increased by 3.873.87 cm. The mass of the metal coin is ___________ gram. (Take water density as 1 g/cm31\ \mathrm{g/cm^3} and density of wood as 0.4 g/cm30.4\ \mathrm{g/cm^3})

Official answer

387

NTA final key.

Chapter
Mechanical Properties of Fluids
Topic
Fluid Statics
Idea tested
Law of Floatation

Same idea in other shifts

Asked 3× in all
  1. 9 Apr 2024, Shift 1 · Q37A sphere of relative density σ\sigma and diameter D has concentric cavity of diameter d. The ratio of Dd\frac{D}{d}, if it just floats on…MediumSingle correct
  2. 8 Jan 2020, Shift 1 · Q6Consider a solid sphere of radius R and mass density ρ(r)=ρ0(1−r2R2)\rho(r) = \rho_0\left(1-\frac{r^2}{R^2}\right), 0<r≤R0 < r \le R. The minimum density…HardSingle 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.