Question

Which of the following is not related to gravitational law?

• A. Motion of planets around the earth
• B. Rainfall
• C. Snowfall
• D. Thunder lightning

Answer 1

The correct option is D

Thunder lightning

Gravitational force :

1. It is defined as the universal attraction force acting between all matter.
2. It is the weakest known force in nature.
3. It controls the trajectories of bodies in the solar system.

The explanation for the right option :

1. Lightning is a naturally occurring electrostatic phenomenon.
2. Lightning occurs usually when too many negative charges build up in a cloud.
3. To balance these negative charges, positive charges form under the cloud on the ground.
4. Due to electrostatic force between negative and positive, negative charges move towards the positive charges on the ground.
5. This movement causes lightning.

The explanation for the wrong option :

1. Motion of planets around earth occurs due to the gravitational force of the earth.
2. Rainfall and snowfall occur due to the earth's gravitational force applied to them.

Hence, option (D) is correct.