Question

The velocity of a liquid coming out of a hole in the tank wall is:

• A. more if the hole is near the upper end.
• B. more if the hole is at the centre of the wall.
• C. more if hole is near the bottom.
• D. velocity of flow does not depend upon the position of the hole.

Answer 1

Answer: (C)

more if hole is near the bottom.

According to Torricelli's Theorem velocity of efflux i.e. the velocity with which the liquid flows out of a hole is equal to $\sqrt{2gh}$ where $h$ is the depth of the hole below the liquid surface. Hence more the depth of the hole, more will be the velocity of the liquid coming out of the hole, and will be maximum if the hole is at bottom of the tank.