To understand in detail how everything is pre-decided we first have to understand the 4 laws of universe which are gravity, strong force, weak force and electromagnetic force.

 

Universe

Both electric and magnetic interactions are elements of a single phenomenon called electromagnetism.

There are four fundamental forces :

The gravity, strong force, the weak force and the electromagnetic force. The study of electromagnetism deals with how electrically charged particles interact with each other and with magnetic fields.

Electromagnetic fields :

An electromagnetic field is generated by electrically charged objects. The field influences the behavior of other charged objects and extends infinitely in space. Stationary electric charges produce an electric field, while moving charges (electric currents) produce a magnetic field. An electromagnetic field consists of a combination of an electric field and a magnetic field.