question_answer

Water rises in a capillary up to a extension height such that upward force of surface tension balances the force of \[75\times {{10}^{-4}}N\] due to weight of water. If surface tension of water is\[6\times {{10}^{-2}}N\text{/}m\]. The internal circumference of the capillary must be:

A)  \[12.5\times {{10}^{-2}}\text{m}\]   

B)         \[6.5\times {{10}^{-2}}\text{m}\]           

C)         \[0.50\times {{10}^{-2}}\text{m}\]    

D)         \[1.25\times {{10}^{-2}}\text{m}\]