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The Mysterious Magnetic Force

Science Caravan · Electromagnetism

Exhibit dimensions: Transport dimensions: 540×440×640mm, Display dimensions: 540×440×1450mm. Exhibit composition: Consists of an ABS plastic molded box, an ABS plastic molded base, an ABS milky white plastic molded operating tabletop with a color silk-screened flip-over instruction board, an iron chain, a magnet, a lifting and swinging mechanism, and an operating handwheel. Turn the handwheel to adjust the height and angle of the magnet, and you will see the iron chain standing upright in the air. Scientific principle: What force keeps the iron chain from falling? When the magnet is lowered close enough to the iron chain, the chain is attracted to the magnet. When the magnet's height is greater than the length of the chain, the chain will detach from the magnet. Because the magnetic force continues to act through the magnetic field distributed in the space near the magnet, even if the chain and magnet are completely out of contact, as long as they are not too far apart, the chain will still be attracted by the magnet and stand in the air. When the distance between the magnet and the chain increases further, and the magnet's attractive force is insufficient to overcome the chain's weight, the chain will fall. Magnets are widely used in electric motors, generators, magnetic therapy, maglev, nuclear magnetic resonance, and other fields.

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