Jacques moves a bar magnet near a circle of copper wire. Moving the magnet creates a changing magnetic field passing through the copper loop. What happens to the copper wire because of the moving magnet?
A)The copper wire carries an electric current.
B)The copper wire develops a negative electric charge.
C)The copper wire loses its magnetic charge.
D)The copper wire develops a positive electric charge.
The answer to this is A)The copper wire carries an electric current. This is due to electromagnetic induction. When a magnetic field is generated, a corresponding electric field is also generated. When a magnet is move over a coil of wire, magnetic field is changing which creates electric current in the wire.
