The small iron bar does not always rest along the north-south direction; it can rest in any direction, indicating that only magnets exhibit this north-south alignment property.
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The small iron bar does not always rest along the north-south direction; it can rest in any direction, indicating that only magnets exhibit this north-south alignment property.
Replacing a bar magnet with a small iron bar in this activity results in the iron bar becoming magnetized temporarily due to the magnetic field, but it will not have a permanent magnetic field or retain strong magnetism once removed.