Understanding Electric Motor Theory for First Timers

[australianschoolkid]

First timer needs help! With theory of electric motors

Hi,
I was wondering if anyone could please explain (or redirect me to) the basic theory in how by spinning a motor in its opposite direction, it produces current. I am conducting an experiment on the amount of current that can be obtained from water running down drain down pipes, this water hits a turbine, which spins it in the motor in a opposite direction, thus producing current.

ANY help at all would be greatly appreciated
Cheers matt.

 

[verty]

The theory is electromagnetism. http://en.wikipedia.org/wiki/Electromagnetism

 

[australianschoolkid]

ok will have a look thanks!