If work done in increasing the size of a...

If work done in increasing the size of a soap film from 10 cm x 6 cm to 10 cm x 11 cm is `2xx10^(-4) J`, then the surface tension is

`2xx10^(-2) Nm^(-1)`

`2xx10^(-4) Nm^(-1)`

`2xx10^(-6) Nm^(-1)`

`2xx10^(-8) Nm^(-1)`

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