A metal wire connects a battery and a light. If you slide a magnet back and forth above the wire, what will happen? A.
Nothing will happen because magnetic fields cannot affect current unless there is also a separate electric field.
B.
The wire will be attracted to the magnet, but the light will not go on.
C.
As the magnet gets near the light, the light will glow faintly because the filament is magnetic.
D.
The light will go on because the changing magnetic field will induce a current in the wire.