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A drop of water placed between two paral...

A drop of water placed between two parallel glass plates which are then pressed together unil the water film is 0.01 cm thick. If the area of water in contact with either plate is 10 `cm^2` , then the force due to surface tension drawing the plates together is (S.T. of water is 75 dyne/ cm)

A

75gm-wt

B

150 gm -wt

C

750gm-wt

D

425gm-wt

Text Solution

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The correct Answer is:
B
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