The surface tension of a liquid is 5 N ...

The surface tension of a liquid is 5 N `m^(-1)` . If a then film is formed on a loop of area 0.02 `m^2` , then its surface energy will be

A

`10^-1 J`

B

`2.5xx10^ J`

C

`20xx10^-2 J`

D

`3xx10^-1 J`

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