Question

Two objects repel each other. This repulsion could be due to

• A. Frictional force only
• B. Electrostatic force only
• C. Magnetic force only
• D. Either electrostatic or magnetic force

Answer 1

The correct option is D

Either electrostatic or magnetic force

Repulsion:

1. Repulsion is the force due to which two or more objects tend to move away from each other.
2. Repulsion between any two objects can be seen if the magnetic or electrical polarity of the objects are the same.

Frictional force:

1. The frictional force is the force due to which the relative motion between contacting surfaces is resisted.
2. Friction can resist the motion of an object but does not repel two objects from each other.

Electrostatic force:

1. The electrostatic force is the attractive or repulsive force between two objects caused by the electric charges.
2. Hence, electrostatic force can be a repulsive force.

Magnetic force:

1. Magnetic force is also an example of the attractive or repulsive force between two objects.
2. The attraction or repulsion due to the magnetic force depends upon the polarity of the objects.

Hence, the repulsion between the objects could be due to electrostatic or magnetic force.

Therefore, option (D) is correct.