STANDARDPhysics-Surface Tension
STANDARD Physics Liquid Films MCQ Question
Type: MCQ-numerical-Medium
The surface tension of the liquid film is
A
0.0125 N m⁻¹
B
0.1 N m⁻¹
C
0.05 N m⁻¹
D
0.025 N m⁻¹
Correct Answer
Option D
Detailed Explanation
The force due to surface tension balances the weight. For a liquid film with two free surfaces, 2SL = W. Solving for S gives 0.025 N m⁻¹.
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