Question

The velocity of efflux of a liquid through an orifice in the bottom of the tank does not depend upon:

• A. size of orifice
• B. height of liquid
• C. acceleration due to gravity
• D. density of liquid

Answer 1

The correct option is A size of orifice

$P_o+\frac{1}{2}{\rho }_{bottom}{v}^2=P_o+{\rho }_{liquid}gh$

Velocity of efflux is independent of the size of orifice.

The density of the fluid is actually varying with depth for large heights. In such scenarios, velocity of efflux depends on the density of the liquid.