Electricity is generated when magnetic fields intersect/interfere with each other.
The generators have two sets of magnets. One is fixed and the other can move around it. When they move against each other, magnetic fields cause electricity to be generated. You can use any way to move those magnets against each other, and it does not have to be rotating (though that is more efficient), sliding against each other will also create electricity.
Mechanically, it is simple to design a rotating turbine which can be driven by a number of mechanisms. This also provides an optimal way of magnetic fields interference with each other. So it is more efficient.
Latest Answers