The correct answer is Both A and R are correct and R is the correct explanation of A.

Explanation:

Assertion A: An electric fan continues to rotate for some time after the current is switched off. This is a correct statement. When you switch off the fan, it doesn't stop immediately but continues to rotate for some time.

Reason R: Fan continues to rotate due to inertia of motion. This is also a correct statement. Inertia is the resistance of any physical object to any change in its state of motion. This includes changes to the object's speed or direction of motion. An object will stay in its state of motion unless a force acts on it. In the case of the fan, after the current is switched off, the fan blades have inertia and continue to move due to this inertia until the frictional forces (like air resistance and friction in the fan's bearings) cause it to stop. Therefore, inertia of motion is the correct reason for the fan's continued motion after the current is switched off.