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Force necessary to pull a circular plate...

Force necessary to pull a circular plate of 5cm radius from water surface for which surface tension is 75 dynes/cm, is ?

A

30 dyne

B

60 dynes

C

750 dynes

D

`750 pi` dynes

Text Solution

Verified by Experts

The correct Answer is:
D
`F = S pi d = 75 xx pi 10 = 750 pi` dynes
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