How to charge a battery shaking a magnet in an inductance (phenomen of magnetic inductance)?
When a magnet is agitated near to a circuit, it induces current in it. But this current is alternative, right? So does it exist some batteries that can charge with an alternative current? Because in fact, most of batteries charge with a direct current given by a transformater, or so it causes damage, don't it? And so, how can we calculate the number of spires of the inductance that give the best way of charging batteries? And what is the law expressing the current variation knowing the magnetic strip variation? A lot of questions, I'm just curious . So thanks in advance for having read my question, hope you can help