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A square wire frame of length l is dippe...

A square wire frame of length `l` is dipped in a solution. When the frame is taken out, a liquid film is formed. What is the algebraic sum of all the force acting on the frame due to surface tension of the liquid? (given`sigma=`surface tension of the liquid).

A

`4sigmal`

B

`8sigmal`

C

`10sigmal`

D

`12sigmal`

Text Solution

Verified by Experts

The correct Answer is:
B
It may be noted that the soap film has two free surfaces. So the effective length is `8l`
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