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A circular loop of a thin wire of radius...

A circular loop of a thin wire of radius `(7//pi)` cm is suspended from one arm of a balance. The plane of the loop is in contact with the surface of soap solution. If the pull on the loop due to surface tension is found to be `(0.6xx10^-3)` kg wt, then the surface tension of soap solution will be,
(Angle of contact`theta=0` )

A

`11xx10^-3 N//m`

B

`21xx10^-5N//m`

C

`21xx10^-3 N//m`

D

`41xx10^-3 N/m`

Text Solution

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