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Can somebody explain the force opposing gravity when you drop a magnet in a copper tube?
Note that the magnet has its South pole at the bottom
The magnetic field of the magnet moves the electrons in the copper tube producing an electric current that creates a magnetic field that opposes that of the magnet, slowing its descent. This property of opposing forces produces an effect called "hysteresis" or "lag"
Dan the net electrical force in the tube would be zero. The energy would be dispersed in the form of heat and light.
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