What is the relationship between flux and emf in an AC generator?

[Googl]

Hi.

Could you please give me a description/analyse a variety of flux changes that can be used to produce an emf.

Could you confirm what is flux and emf in this situation?

 

[cragar]

http://www.youtube.com/watch?v=qxuGDEz8wDg&feature=channel
watch the first 12 minutes of this video, He explains how a rotating loop of wire in a magnetic field produces an emf , This is a very good video.

 

[Edgardo]

More videos:

Magnetic Flux
Explains what a magnetic flux is.

http://www.youtube.com/watch?v=pB7oZNBIqqc"
Shows a rotating surface in a magnetic field and how the flux changes.

http://www.youtube.com/watch?v=nRMZ3K2pzcE"
Explains how an AC generator works.