PatchworkTeapot
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In the common experiment when a powerful magnet is dropped through a copper tube, explain where the motor effect and the generator effect occur.

I think that the generator effect occurs when some of the energy from gravitational potential is converted into electrical energy and a magnetic field is induced. But where is the motor effect occurring? And are they complementing each other or opposing?
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uberteknik
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(Original post by PatchworkTeapot)
In the common experiment when a powerful magnet is dropped through a copper tube, explain where the motor effect and the generator effect occur.

I think that the generator effect occurs when some of the energy from gravitational potential is converted into electrical energy and a magnetic field is induced. But where is the motor effect occurring? And are they complementing each other or opposing?
Think about the copper tube as being a conductor for a moment. The conductor cuts the magnetic field lines as the magnet moves towards it and according to Faraday, the changing magnetic field causes an E.M.F. to be generated in the copper and hence a current is also produced.

However, the movement of electrons (current) in the copper, according to Lenz, will produce a mutual magnetic field which tries to oppose changes to the original magnetic field that created it.

The magnets permanent field will thus interact with the induced copper magnetic field and because both fields oppose each other, the magnets fall through the copper is slowed.

Hence the motor action is to slow the fall of the permanent magnet.
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PatchworkTeapot
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Thank you
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