JEE Main 2022 Physics question
The diameter of an air bubble which was initially 2 mm, rises steadily through a solution of density 1750 kg at the rate of 0.35 cm . The coefficient of viscosity of the solution is poise (in nearest integer). (The density of air is negligible).
Answer: 11
Solution
At terminal velocity the viscous force equals the buoyant force: , so $η =
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