Principle
After being coated with the magnet, the notched iron wire has become a magnet with a north pole and a south pole. If it is now broken into two parts, both parts are also complete magnets with north and south poles.
Principle
After being coated with the magnet, the notched iron wire has become a magnet with a north pole and a south pole. If it is now broken into two parts, both parts are also complete magnets with north and south poles.