A body is float inside liquid. If we increase temperature then what changes occur in buyancy force? (Assume body is always in floating condition)

Options

A. Buoyancy force will increase
B. Buoyancy force will decrease
C. Buoyancy force remains constant
D. Cannot be calculated from given statement

Answer

C

Explanation

Body is in equilibrium, buoyancy force will balance the weight of the body.
`mg = B`
The gravitational force does not change with change in tenperature. So Buoyancy force remains constant.
By increasing temperature density of liquid decreases so volume of body inside the liquid increases to kept the Buoyancy force constant for equal to gravitational force.