Question

With increase in temperature of a liquid, the buoyant force acting on a body immersed in it will

• A.
  Increase
• B.
  Decrease
• C.
  Remain same
• D.
  First increase then decrease

Answer 1

The correct option is B

Decrease
If an object of volume 'V' is fully immersed in a liquid of density ρ, then the buoyant force acting on it will be equal to $V\rho g.$

Buoyant force depends on the density of the liquid. With an increase in temperature, the density of the liquid decreases. As the density decreases, the buoyant force also decreases.

Hence, the correct answer is option (b).