Question

Which of the following is strongest of all fundamental forces?
A. Weak nuclear force
B. Strong nuclear force
C. Electromagnetic force
D. Gravitational force

Answer 1

The gravitational force is the weakest force of all the four fundamental forces though its range is very large. On the other hand, Strong nuclear force is the strongest force though it is a very short range force. This force is responsible to hold the nucleons tightly in their positions and is the reason for the binding energy of an atom.

Complete step by step answer:
The whole universe works on four basic and fundamental forces. These four fundamental forces are named Weak Nuclear force, Strong nuclear force, Electromagnetic force and the very known Gravitational force.
The Strong nuclear force and the Weak nuclear force are the forces within an atom. The Strong nuclear force is the strongest of all the fundamental forces as its neutrons and protons of the nucleus are tightly bound with each other. Though this force is the strongest, it is a short range force. The weak force, on the other hand, is responsible for the transformation of one type of subatomic particle into another. It leads to decay of a subatomic particle. This is also a short range force.
The charged particles like electrons and protons have some electrical and magnetic properties. The electromagnetic force acts between these types of charged particles. It is also called the Lorentz force. This force has infinite range. Gravitational force is the force of attraction between two bodies with mass. It is given by Newton’s laws. This is also a long range force.

So, the correct answer is “Option B”.

Note:
The strong nuclear force gets weaker as molecules move closer to each other. (This property is totally opposite from the remaining three forces). The molecules can also repel each other if the distance is too close. As the repulsive force is very strong, the force needed to push the molecules together is very great.