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what is the difference between an electromagnet and a bar magnet? A. a bar magnets magnetic field is a perfect circle. B. a bar magnet weighs less than an electromagnet. C. an electromagnets magnetic field can be switched on and off. D. an electromagnet has only one pole while a bar magnet has two.
The answer is A
Expert answered|lexishantell07|Points 130|
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Asked 6/22/2011 8:56:09 AM
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