Q.

Radius of a soap bubble is increased from R to 2R work done in this process in terms of surface tension is

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a

24πrR2S

b

48πrR2S

c

12πrR2S

d

36πrR2S

answer is A.

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Detailed Solution

W=ΔE=8πT(2R)2−R2 =24πR2T
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