Alternators, What are they, and how do they do that?

-Alternators make Alternating Current -This can happen by Rotating a Magnet in a Coil of Wire -During the Magnets Spins, a Alternating Pd is Induced at the Ends of the Coil. The Potential Difference changers Direction around every Half Turn because the Field Change also changes Direction -This makes an Alternating Current -You can also get an Alternating Current, by Rotating a Coil in a Magnetic Field -Slip Rings are attached to the Ends of the Coil which can stay in touch with Brushes that is in touch with the rest of the Circuit. -This also means the Contacts do not Swap every half turn, so AC is Produced