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

If work done in increasing the size of a soap film from `10cmxx6cmxx` to `10cmxx11xm` is `2xx10^-4H`, then the surface tension is

A

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

B

`2xx10^-4Nm^-1`

C

`2xx10^-6Nm^-1`

D

`2xx10^-8Nm^-1`

Text Solution

Verified by Experts

The correct Answer is:
A
`T=(W)/(triangleA)=(2xx10^-4)/(2xx(50xx10^-4))=2xx10^-2(N)/(m)`
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