A) \[8\pi {{r}^{2}}T\]
B) \[4\pi {{r}^{2}}T\]
C) \[\frac{4}{3}\pi {{r}^{2}}T\]
D) \[\frac{8}{3}\pi {{r}^{2}}T\]
Correct Answer: A
Solution :
The work done in making a soap bubble is given by \[W=T\times A\] where, T= surface tension \[A=2\times 4\pi {{r}^{2}}\] Therefore, \[W=T\times 8\pi {{r}^{2}}\] \[=8\pi {{r}^{2}}T\]You need to login to perform this action.
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