ocr: Magnetism in close-up If you could take a close-up look at: a piece of iron, you would see that it is made of tiny groups of atoms, called domains, that act like tiny magnets. DEMAGNEIIZED MAGNEIIZED Normally, the domains in the iron point randomly in different directions. Their magnetic fields tend to cancel each other out, so that overall the piece of iron has no magnetic field. However, if the iron is: magnetized, its domains will all face the same way, producing a strong overall magnetic field. Magnets were first used in compasses. Now they are used in many different types of machines such ...
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