/sci/ - Science & Math

>>14879691
In simple electrical generators like pic related, in real life, how do they make these spin? If you put a current through it, wouldn't the thing start spinning solely by magnetic forces? Obviously that isn't possible and I'm making a retarded mistake, they're turned by mechanical forces; does the Lorentz force then assist it in turning?

By energy conservation, there have to forces that stop the thing from turning, otherwise it'd infinitely turn by its own induced current.