Magnets are used in computer data storage, compasses, doorbells and alarm systems, microphones and speakers, motors, electrical generators and electrical transformers. They are also used to levitate objects, including tr... More »

The uses of magnets in everyday life include in the household, credit cards, electronics, industrial work, medical equipment and jewelry. In different industrial fields, magnets are useful as magnetic sweepers or sorters... More »

Although magnets were not invented, they were discovered by either the ancient Greeks or the Chinese. According to a legend, a Greek shepherd accidentally discovered lodestones in an area called Magnesia. Lodestone conta... More »

Magnetic tapes and other magnetic data storage media can be effectively destroyed either by destroying the data on the tapes or by destroying the tapes themselves. Without proper destruction, data is still recoverable by... More »

Gyroscopic compasses are used aboard transportation such as ships and airplanes. Spinning gyroscopes copy the behavior of a magnetic compass by using a magnetic compass as a reference. A motor keeps the gyroscope spinnin... More »

Store-bought compasses have a lightweight and magnetized pointer fixed on a low-friction pivot; a small plastic cylinder filled with liquid seals the pointer. Settle the needle and rotate the compass card (the layer of p... More » Science Physics Magnetism

To demagnetize a magnet, cause disorder to the unit magnets within the magnetic material. Strike the magnet first with a hammer, heat it strongly, and then subject it to AC current to eliminate magnetic ability completel... More »