A squre wire frame of side L is dipped i...

A squre wire frame of side `L` is dipped in a liquid. On taking out , a membrane is formed if the surface tension of liquid is T, the force acting on the frame due to the membrane will be

2 TL

4 TL

8 TL

16 TL

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The correct Answer is:

For each wire force is `2Tl` so that for four wires of frame `F=8Tl`

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