STANDARDPhysics-Surface Tension
STANDARD Physics Pressure in Bubbles MCQ Question
Type: MCQ-numerical-Medium
The excess pressure inside a soap bubble is three times than excess pressure inside a second soap bubble, then the ratio of their surface area is
A
9 : 1
B
1 : 3
C
1 : 9
D
3 : 1
Correct Answer
Option C
Detailed Explanation
Pressure, P ∝ 1/r. Therefore, P₁/P₂ = r₂/r₁ = 3/1. Also, A₁/A₂ = (r₁/r₂)² = 1/9.
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