There are two ultimate laws of magnetism that are as follows:

###
**First Law**

It conditions that ‘Like Magnetic poles repel and dissimilar poles attract each other’.

This was already discussed in the previous post Magnet and its properties.

###
**Second Law**

This rule is experimentally showed by researcher coulomb and hence also known as coulomb’s law.

The force (F) put forth by one pole on the additional pole is,

- directly proportional to the product of the pole fortes,
- inversely proportional to the square of the distance in the middle of them and
- nature of medium contiguous the poles.

This law can be expressed in mathematically as,

**F**

**∝**

**[(M**

_{1}xM_{2})/d^{2}]
Where M1 and M2 are pole strengths of the poles,

while d is distance between the poles.

**∴**

**F = [(K M**

_{1 }M_{2}) / d^{2}]
Where K depends on the nature of the surroundings and called permeability.