Question

Fill in the blank:

The buoyant force exerted by a liquid _______ with the decrease in density of liquid.

• A. increases
• B. decreases
• C. remains same
• D. cant say

Answer 1

The correct option is B decreases

A solid experiences a force upwards when immersed in liquid, equal in magnitude to the weight of the liquid displaced by the solid, called the buoyant force.

Mathematically $B=V\rho g$

where $V$ is the volume of solid immersed in water=Volume of displaced water

and $\rho$ is the density of the liquid.

$⟹B\propto \rho$

Hence the buoyant force also decreases with decrease in density of liquid.