# Laws of Magnetism

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 [(M1xM2)/d2]
Where M1 and M2 are pole strengths of the poles,
while d is distance between the poles.
∴ F = [(K M1 M2) / d2]
Where K depends on the nature of the surroundings and called permeability.