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Question
A square frame of side L is dipped in a liquid. On taking out, a membrane is formed. If the surface tension of the liquid is T, the force acting on the frame will be
A square frame of side L is dipped in a liquid. On taking out, a membrane is formed. If the surface tension of the liquid is T, the force acting on the frame will be
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Solution
The correct option is C 8 TL
Force acting on the frame = (Surface tension)(Contact length)
Each side of the square frame will be in contact with the given liquid over two sides.
∴ F=(T)(2L)(4)
∴F=8TL.
8 TL
Force acting on the frame = (Surface tension)(Contact length)
Each side of the square frame will be in contact with the given liquid over two sides.
∴ F=(T)(2L)(4)
∴F=8TL.
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