NEET Physics Surface Tension MCQ Question
What is the formula for calculating the capillary rise in a tube due to surface tension?
h = (2S cos θ) / (a ρ g)
h = (2S a) / (ρ g)
h = (S cos θ) / (2a ρ g)
h = (2S) / (a cos θ ρ g)
Correct Answer
Detailed Explanation
The formula for capillary rise is derived from the balance of pressure differences and surface tension, given by h ρ g = (2S cos θ) / a, where h is the capillary rise, S is surface tension, θ is the angle of contact, a is the radius of the tube, and ρ is the density of the liquid.
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