My son has a game in which you hang small plastic monkeys and gorillas from a plastic network of tree branches. The branch network is attached to an overhanging trunk by a magnet. As more monkeys are hooked on, the network becomes more unsteady until the magnet can hold it up no more. The player who breaks the bond is declared the loser.The game depends on a magnet of a clearly defined strength. But how is this strength determined so accurately during manufacture that it can hold almost all the monkeys (but not quite)?Pavel Sypchenko, Kiev, Ukraine
the magnets are made of an neutral material and whitout any magnetical caracter , after that the object is put in an electrical magnetizing machine with witch you can caontrol the powet of the magnet. EX. 12volt = X atracting power