Characteristics of electromagnetic force and gravitational force

Characteristics of Electromagnetic force

Electric force can be attractive or repulsive but obeys the inverse square law of distance.

 Electromagnetic forces depend on the intervening medium.

They are long- range forces.

 They act only when both the interacting bodies are charged and then they are enormously

greater than the gravitational force between these bodies.

Characteristics of Gravitational Force

It is an attractive force and obey the inverse square law of distance.

It does not depend on the intervening medium.

Gravity is a very weak but long-range interaction It is because G is so small that it hard to measure it and makes gravity the weakest of the four basic forces in nature.

Because gravity is so weak , it is of importance only when the interacting bodies are unchanged and at least one of the bodies is very massive i.e of Astronomical size.

Because it is always of attraction and the celestial bodies are practically uncharged it is responsible for the large scale structure of the universe.