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MHT CET 2026 (19 Apr, Shift 1) · Excess Pressure: Drops & Bubbles

Excess Pressure: Drops & Bubbles question from MHT CET 2026 (19 Apr, Shift 1)

Q8MHT CET 2026 · 19 APR · SHIFT 1Medium

Excess Pressure: Drops & Bubbles

The pressures inside two soap bubbles A and B are $1.02$ atmosphere and $1.04$ atmosphere respectively. The ratio of volume of bubble A to that of bubble B is (outside pressure $= 1$ atmosphere)

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Answer: (b)

Excess pressures: $\Delta P_A = 0.02$ atm, $\Delta P_B = 0.04$ atm.
$\Delta P \propto \frac{1}{R} \Rightarrow \frac{R_A}{R_B} = \frac{0.04}{0.02} = 2$
$\frac{V_A}{V_B} = 2^3 = 8$
So the answer is (b) $8 : 1$ .

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