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The work done in increasing the size fil...

The work done in increasing the size film with dimensions `8cm xx3.75xm` to `10cmxx6cm` is `2xx10^(-4)J`. The surface tension of the film in `(N)/(m)` is

A

`165xx10^(-2)`

B

`3.3xx10^(-2)`

C

`6.6xx10^(-2)`

D

`8.25xx10^(-2)`

Text Solution

Verified by Experts

The correct Answer is:
2
`T=(W)/(DeltaA)impliesw=2DeltaAT` (soap film have two surface areas)
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