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MHT CET 2024 (3 May, Shift 2) · Excess Pressure: Drops & Bubbles

Excess Pressure: Drops & Bubbles question from MHT CET 2024 (3 May, Shift 2)

Q29MHT CET 2024 · 3 MAY · SHIFT 2Medium

Excess Pressure: Drops & Bubbles

The pressure inside a soap bubble $A$ is 1.01 atmosphere and that in a soap bubble B is 1.02 atmosphere. The ratio of volume of bubble A to that of B is [Surrounding pressure $= 1$ atmosphere]

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Answer: (c)

Excess pressures: $\Delta P_A = 0.01$ atm, $\Delta P_B = 0.02$ atm.
$\Delta P \propto \frac{1}{R} \Rightarrow \frac{R_A}{R_B} = 2$
$\frac{V_A}{V_B} = 2^3 = 8$
So the answer is (c) $8 : 1$ .

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