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Not really. Magnetism - just like electricity or gravitation - is a "conservative force", which basically means that if you get energy when something moves in one direction, then you NEED the same amount of energy to move it in the opposite direction. For example, it requires energy to lift an object (against the force of gravity); in theory you can recover this energy when the object falls back down.

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10y ago
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Q: Can a machine be powered by the earths magnetic field?
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