Question

The shape of water in a capillary tube open at both the ends is?

Solution

In option (A) and (D), the surface tension water and capillary cancelling each other (net surface tension is zero) and only force exist there is mg. So water can't stay in tube in this shape.

In option (B), the direction of net surface force is in the same direction of mg. Therefore, this shape also not possible.

In option (C), direction of net surface tension and mg is opposite. Therefore, water shape will be (C)