NEET Physics Surface Tension MCQ Question
A U-shaped wire is dipped in a soap solution and removed, forming a soap film that supports a weight of 1.5 × 10^-2 N with the length of the slider being 30 cm. What is the surface tension of the soap film?
0.025 N/m
0.050 N/m
0.075 N/m
0.150 N/m
Correct Answer
Detailed Explanation
Surface tension is calculated using the formula T = F/2L, where F is the force (weight supported) and L is the length of the slider. Here, T = (1.5 × 10^-2 N)/(2 × 0.30 m) = 0.050 N/m.
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