Title: 1.But, where does the rotational motion come from?
Course: THE MIST€RY OF ELECTRICITY.I > Section: 4. ELECTRICITY AT HOME

At large scale we need huge magnets, kilometers of wire all around, and some motion or mechanical movement. The set is called GENERATOR or turbine-alternator group. The generator transforms the rotational movement into electricity.

Fig. http://es.wikipedia.org/wiki/Alternador

Fig.http://www.monografias.com/trabajos82/generadores-sincronos/generadores-sincronos2.shtml

- From a magnetic field.
- From air
- From waterfalls
- All the answers are OK
- Only answer 2 and 3 are OK