question_answer

Water rises in a capillary tube to a certain height such that the upward force due to surface tension is balanced by \[75\times {{10}^{-4}}N\] force due to the weight of the liquid. If the surface tension of water is \[6\times {{10}^{-2}}\,N{{m}^{-1}}\], the inner circumference of the capillary must be      [CPMT 1988, 86]

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

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

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

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