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A 10 cm long wire is placed horizontal o...

A 10 cm long wire is placed horizontal on the surface of water and is gently pulled up with a force of `2xx10^(2)` N to keep the wire in equilibrium. The surface tension, in `Nm^(-1)` of water is

A

`0.1 N//m`

B

`0.2 N//m`

C

`0.001 N//m`

D

`0.002 N//m`

Text Solution

Verified by Experts

The correct Answer is:
A
Force on wire due to surface tension `F=Txx2l`
`therefore T = (F)/(2l) = (2xx10^(-2))/(2xx10xx10^(-2))=0.1 N//m`
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