How does an electric generator work?
A The axle rotates the armature in the magnetic field of a permanent magnet, which induces an electric current.
B The armature rotates the axle in the magnetic field of a permanent magnet, which induces an electric current.
C The axle rotates the armature in the magnetic field of an electromagnet, which induces an electric current.
D The armature rotates the axle in the magnetic field of an electromagnet, which induces an electric current.
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