A Generator converts mechanical energy to electrical energy, but how exactly does this process take place. What happens is that when a coil is rotated in a magnetic field an EMF is induced in it causing a current to flow in a specific direction (the direction of the current depends on the direction of the rotation of the coil or the direction of the magnetic field, and its direction can be determined by the right-hand rule).
What are “brush contacts” and why are they used ???