The buoyant force on an object immersed in liquid acts in :

The correct answer is Upward direction.

Step-by-Step Explanation:

1. Understanding Buoyancy:
When an object is immersed partially or fully in a fluid (liquid or gas), it experiences a force exerted by the fluid surrounding it. This force is called the buoyant force or upthrust.

2. Origin of the Buoyant Force:
Pressure in a liquid increases with depth due to the weight of the liquid column above. The pressure at depth $h$ is given by:

$P=\rho gh$

3. Direction of the Net Force:
Because pressure increases with depth, the pressure acting on the bottom surface of an immersed object (which is deeper) is always greater than the pressure acting on its top surface (which is shallower).
As a result, the upward force exerted by the fluid on the bottom of the object is greater than the downward force exerted on the top. This difference in pressure creates a net force that acts in the upward direction.

4. Conclusion:
Therefore, the buoyant force always acts vertically upwards, opposing the weight of the immersed object.