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How can a permanent magnet be demagnetized? 1. Cut the magnet in half. 2. Heat the magnet up. 3. Strike the magnet with a heavy blow. 4. both the second and third choices above.
4. both the second and third choices above.
Expert answered|Cluvsny|Points 230|
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Asked 5/7/2012 8:02:50 PM
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Updated 5/1/2012 12:35:14 PM
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A device that changes mechanical energy to electrical energy by rotating a coil of wire through a magnetic field is called 2. generator.
Added 5/1/2012 12:35:14 PM
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