Question

The force of buoyancy is equal to:

• A. Weight of the body
• B. Weight of the liquid displaced by the body
• C. Apparent weight of the body
• D. None of these

Answer 1

The correct option is B Weight of the liquid displaced by the body

Consider a body being completely immersed in a liquid.
The fluid then attains equilibrium & part of fluid substituting for the body, is also in equilibrium.
Forces acting on substituting fluid are
(a) weight $mg$ of part of fluid
(b) resultant buoyant force $B$
$\therefore$ As its in equilibrium $B=mg$