Properties Of Solids And Liquids Question 362

Question: Radius of a soap bubble is increased from R to 2R work done in this process in terms of surface tension is [BHU 2003, RPET 2001; CPMT 2004]

Options:

A) $ 24\pi R^{2}S $

B)$ 48\pi R^{2}S $

C) $ 12\pi R^{2}S $

D)$ 36\pi R^{2}S $

Show Answer

Answer:

Correct Answer: A

Solution:

$ W=8\pi S(R _{2}^{2}-R _{1}^{2})=8\pi S[{{(2R)}^{2}}-R^{2}]=24\pi R^{2}S $



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