im trying to understand how an electric generator works
no equations required
The Attempt at a Solution
here is a diagram of an electric generator, and a small section of what my lesson was trying to explain:
so this was the explanation from my lesson. I undestand that an electric generator produces electricity, and functions opposite to that of an electric motor. According to the excerpt above, the coil is placed within the external magnetic field of the permanent magnets, and it is forced to rotate? how is this possible if the coil does not have a current running through it, the coil does not have a magnetic field to interact with the external magnetic field of the magnets, so there is no force being applied on the coil, right? so then how is the coil rotating?
So then the excerpt goes on to say that this rotation produces an induced current in the coil. Arent induced currents created in conductors by a change in the magnetic field. So which magnetic field is changing, is it the magnetic field of the permanenet magnets? They mentioned that the induced current is created in the coil, due to a changing magnetic field that passes through the coil, where is this 'changing' magnetic field coming from, I am confused?
why does the current in the coil reverse direction every half-rotation??
Can someone please explain how an electric generator works, in terms of how the current is being created within the coil, what magnetic field is changing to cause this induced current, how the coil is rotating to begin with, etc...
thanks for the help!