Hey, I'm lightly studying 'Generating' as a topic in my Physics curriculum. I have just been introduced to an AC Generator, an Alternator, and I have a simple question: Is the armature in an alternator an electromagnet? From my understanding, there is a U-Shaped length of wire(s) which rotates, generating a current (in a generator). This then produces an AC current in the stator coils surrounding. I believe the U-shaped rotating piece is the armature. I have been confused by the multiple interpretations of an AC generator, and do not have access to one myself. Could someone please explain this to me. Some say an iron core (nail) in a solenoid, whilst others show the familiar U-Shape I have seen in online motor demonstrations. Also, do the electrons of an AC in the stator coils literally move back and forth? Is yes, does that mean that when they move back, there is a very short moment when no current powering the appliance? I appreciate any answers.