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A thin liquid film formed between a U-sh...

A thin liquid film formed between a U-shaped wire and a light slider supports a weight of `1.5xx10^-2N` (see figure). The length of the slider is 30cm and its weight negligible. The surface tension of the liquid film is

A

`0.0125Nm.1`

B

`0.1Nm.1`

C

`0.05Nm.1`

D

`0.025Nm.1`

Text Solution

Verified by Experts

The correct Answer is:
D
`2TL=mg`
`T=(mg)/(2L)=(1.5xx10^(-2))/(2xx30xx10^(-2))=(1.5)/(600)=0.025N//m`
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