Question

Which of the following is not a similarity between electrostatic and gravitational forces.

• A.
  Both can act in vacuum.
• B.
  Both obey the inverse-square law.
• C.
  Both are central forces and conservative in nature.
• D.
  Both can repel as well as attract particles.

Answer 1

The correct option is D

Both can repel as well as attract particles.
Explanation: Electrostatic force between two charges can be attractive or repulsive depending upon the type of charges. If we take opposite charges then there will be attractive force and if we take similar charges then there will be repulsive force between them.

But In case of Gravitation there is only one kind of mass and therefore the force will always be attractive in nature.