If you drop strong magnets onto a plate of copper, something remarkable happens: the magnets slow down before hitting the surface and appear to levitate slightly, like the copper is another magnet, ...
Today's computers store information in magnetic hard drives, keeping files safe even when the device is powered off. But to ...
Power generation is based on the 1831 discovery by Michael Faraday, which showed that moving a magnet within a coil of wire can generate an electric current. Generators are based on the connection ...
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