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A U-shaped wire is dipped in a soap solu...

A U-shaped wire is dipped in a soap solution, and removed. A thin soap film formed between the wire and a light slider supports a weight of `1.5xx10^(-2)N` (which includes the small weigh of the slider). The length of the slider is 30cm. What is the surface tension of the film?

A

`0.025`N/m

B

`0.050`N/m

C

`0.5`N/m

D

`0.250`N/m

Text Solution

Verified by Experts

The correct Answer is:
A
`T = F/(2l) = (1.5xx10^(-2))/(2xx30xx10^(-2))= 0.025` N/m
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