The surface tension of soap solution is ` 10 xx 10^(-2)` n/m . The amount of work done in blowing a soap bubble of radius 2 cm is
The surface tension of soap solution is ` 10 xx 10^(-2)` n/m . The amount of work done in blowing a soap bubble of radius 2 cm is
A. `10.04 xx 10^(-4)`J
B. `10.4 xx 10^(-5)`J
C. `10.04 xx 10^(-3)`J
D. zero
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Correct Answer - A
`W= Txx 2xxA`
` = 2 xx10^(-2) xx 2xx 4xx3.14 xx 4xx10^(-4)`
` = 20.09xx 10^(-5)` J
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