Permanent magnets with diminished field strength can be recharged in at least three ways: by striking, stroking or stacking. Each of these methods entails lining up the weakened magnet with a stronger external field and ... 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 »

A Mosquito Magnet is a commercially available brand of mosquito trap which uses a combination of carbon dioxide, warm moisture and a plant-chemical simulator to attract mosquitoes. When the mosquitoes approach the Mosqui... More »

Permanent magnet generators produce electricity by rotating strong magnets around metal wires. These conductive wires then convey the electricity throughout a residence or industrial complex for decades, because the magn... More »

The north and south poles, often called the negative and positive sides, of a magnet are determined by using the directional properties of magnets. The north pole of the magnet is attracted to Earth's geographical north ... More »

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 »

Testing different magnets to determine their strength or building a linear accelerator with magnets are some science projects using magnets that are appropriate for children. Experiments such as these are available on Ho... More »