A permanent magnet, such as a bar magnet, has its own north and south poles all the time. It does not need another magnet to be present. Because it has its own poles, a permanent magnet can both attract and repel another magnet.
An induced magnet is a piece of magnetic material, such as iron, that becomes a magnet only while it is in a magnetic field. If an iron nail is placed near the north pole of a bar magnet, the end of the nail nearest the magnet becomes a south pole. Unlike poles attract, so the nail is attracted to the magnet. The nail can even pick up small iron pins, because those pins become induced magnets too.
An induced magnet is always attracted by the magnet that induces it. It can never be repelled. When the induced magnet is taken out of the magnetic field, it loses most or all of its magnetism. This gives a test: if a metal bar is repelled by a magnet, the bar must be a permanent magnet, because only a permanent magnet can repel.
