A square 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 will be
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a
2TL
b
4TL
c
8 TL
d
10TL
answer is C.
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Detailed Solution
Ftotal =T× total circumference =T×2×4L Ftotal =8TL