When one end of the capillary is dipped in water, the height of the water column is $h$ . The upward force of $105 dyne$ due to surface tension is balanced by the force due to the weight of the water column. The inner circumference of the capillary is
(Surface tension of water $= 7 \times 10^{- 2} N m^{- 1})$

Question

TestHub · Accepted Answer

F = 105 d y n e = 105 × 10 - 5 N , T = 7 × 10 - 2 N m - 1 2 π r T = F 2 π r = F T = 105 × 10 - 5 7 × 10 - 2 = 15 × 10 - 3 m = 1.5 × 10 - 2 m = 1.5 cm

Physics - Fluid Question with Solution | TestHub

Options:

Doubts & Discussion