A square frame of length L is immersed in soap solution and taken out. The force experienced by the square plate is
A square frame of length L is immersed in soap solution and taken out. The force experienced by the square plate is
A. TL
B. 2 TL
C. 4 TL
D. 8 TL
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Correct Answer - D
F = 2 br
= 8TL
R = 2r
`dW = 4 pi R^(2)T (n^(1//3)-1)`
` = 4pi R^(2)T xx (2-1)`
` dW = 4 pi R^(2) T`
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