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        Q: What is a permanent magnet motor?
A: any DC motor is a permanent magnet motor . if you are able get an old generator from an old vehicle ( not an alternator ) some automobiles are rated DC volts you are able use these 

Q: What are the three uses of a permanent magnet?
A: This is a genuinely huge issue , so it is difficult to restrict the answering to solely two ! . Audio speaker drivers . Fridge magnets . Microphones . Motors . Generators 

Q: What advantage does an electromagnet have over a permanent magnet?
A: See comparison and contrast permanent vs. temporary magnet . Unless , obviously , these people are really two various issues .