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A wire is bent in the form of a U-shape ...

A wire is bent in the form of a `U`-shape and a slider of negligible mass is connecting the two vertical sides of the U-shape. This arrangement is dipped in a soap solution and lifted a thin soap film is formed in t he frame it supports a weight of `2.0xx10^(-2) N` if the length of the slider is 40 cm what is the surface tension of the film?

A

`25Nm^(-1)`

B

`2.5Nm^(-1)`

C

`2.5xx10^(-2)Nm^(-1)`

D

`2.5xx10^(-3)Nm^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
`T=(F)/(2l)`
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