There are four fundamental forces in the universe

1. Gravitational force

2. Electromagnetic force

3. Strong nuclear force

4. Weak nuclear force

Arrange these forces in the order from strongest to weakest using the following codes:

a) 3,1,2,4
b) 3,2,1,4
c) 3,2,4,1
d) 3,4,1,2

Ans- c

Explanation-  Decresing order of arrangement of forces are:

1. The Strong ForceResponsible for binding of nuclei. It is the strongest force in nature. This force is so strong that it binds and stabilize the protons of similar charges within a nucleus. However, it is very short range.
2.  The Electromagnetic Force
   Force between particles which have an electric charge. For example, negatively chared electrons bind nucleus of an atom, due to the presence of positively charge protons. The force is long range, in principle extending over infinite distance. However, the strength can quickly diminishes due to shielding effect.
3. The Weak Force This force is responsible for beta decay and other other decay processes involving fundamental particles. The range of this force is smaller than 1 fm and is 10-7 weaker than the strong force.

4. The Gravitational Force
   Force which holds us onto the Earth is gravitational force. On the scale of atomic world it is of negligible. Gravitational force can extended to infinity. Larger the body the stronger the gravitational force. But on the scale of individual particles, the force is extremely small, in the order of 10-38times that of the strong force.