Work of $3.0\times10^{-4}$ joule is required to be done in increasing the size of a soap film from $10\, cm\times6\, cm$ to $10\, cm\times11\, cm$. The surface tension of the film is
Work of $3.0\times10^{-4}$ joule is required to be done in increasing the size of a soap film from $10\, cm\times6\, cm$ to $10\, cm\times11\, cm$. The surface tension of the film is
- A
$5\times10^{-2}\, N/m$
- B
$3\times10^{-2}\, N/m$
- C
$1.5\times10^{-2}\, N/m$
- D
$1.2\times10^{-2}\, N/m$
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