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A soap film measure 10cmxx6cm. It is inc...

A soap film measure `10cmxx6cm`. It is increased to `10cmxx12cm`. IF surface tension is `30xx10^-3` newtor per metre. Then the work done is

A

`3.6xx10^0J`

B

`3.6xx10^-2J`

C

`3.6xx10^-4J`

D

`3.6xx10^3J`

Text Solution

Verified by Experts

The correct Answer is:
C
`W=2[120xx10^-4-60xx10^-4]30xx10^-3J`
`=2xx60xx10^-4xx30xx10^-3J=3.6xx10^-4J`
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