I only understand the production of magnetoelectric energy.
The principle is that when the copper wire moves in the magnetic factory, the initially directionless electrons in the copper wire become charges with a fixed flow direction under the action of the magnetic plant when the load is large enough. , it overcomes the resistance of the wire. There are positive and negative poles at both ends of the wire when there is flow. .
To put it simply, current is generated when the conductor moves through the magnet factory. If you don't believe me, try taking a magnet and shaking a piece of copper wire around the magnet (but it has to be within the magnet's magnetic field). A sensitive ammeter can measure it.
In addition to magnetoelectricity, there is also chemical electricity
Photoelectricity, etc.