Question

Excess pressure inside a soap bubble is proportional to

Answer 1

Consider a soap bubble of radius R and surface tension T. There are two free surfaces of soap bubble. Due to surface tension, the molecules on the surface film experience the net force in the inward direction normal to the surface.
Excess pressure inside a soap bubble is (a) Inversely proportional to its radius (b) Directly proportional to its radius (c) Directly proportional to square roots of its radius (d) Independent of its radius

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Answer 2

Excess pressure inside a soap bubble is (a) Inversely proportional to its radius (b) Directly proportional to its radius (c) Directly proportional to square roots of its radius (d) Independent of its radius