NEETPhysics-Properties of Matter
NEET Physics Surface Tension MCQ Question
Type: MCQ-numerical-Easy-Class 11
What is the excess pressure inside a bubble of soap solution of radius 5.00 mm, given that the surface tension of soap solution at 20°C is 2.50 × 10⁻² Nm⁻¹?
A
10 Pa
B
20 Pa
C
40 Pa
D
80 Pa
Correct Answer
Option C
Detailed Explanation
The excess pressure inside a soap bubble is given by 4T/R, where T is the surface tension and R is the radius. Substituting the given values, the excess pressure is 40 Pa.
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