In a generator, what does the rotating armature pass through to generate electricity?

• A. A Fixed Magnet Field With No Rotation
• B. A Rotating Armature Passing Through A Series Of Stators
• C. A Coil Of Diodes
• D. A Battery Pack

Answer: (B)

Electricity is produced when a conductor moves through a magnetic field, causing the magnetic flux linking the conductor to change. In a generator, the rotating armature is the conductor, and it turns within the stationary magnetic field created by the stator windings (or by permanent magnets). As the armature passes through this magnetic field, the changing flux induces current in the windings, generating electricity. So the rotating armature passing through a series of stators describes the essential motion: the armature moves relative to the fixed magnetic field to produce the output. The other options don’t provide that relative motion or the induction pathway: a fixed magnetic field with no rotation won’t induce current, a coil of diodes is for rectification, and a battery pack is a power source, not the generator action.