The diagram shows a bar magnet at rest on a smooth horizontal surface. A length of soft-iron wire is held parallel to the magnet.
The wire is released.
What happens?
1 )
The wire moves away from the magnet.
The wire moves towards the magnet.
3 )
The wire’s centre stays in its present position and the wire rotates through 90° in a clockwise direction.
4 )
The wire’s centre stays in its present position and the wire rotates through 90° in an anticlockwise direction.
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