A magician places an aluminum ring on a table, underneath which is hidden an electromagnet. When the

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A magician places an aluminum ring on a table, underneath which is hidden an electromagnet. When the magician says "abracadabra" (and pushes a switch that starts current flowing through the coil under the table), the ring jumps into the air. Explain his "trick."
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Conceptual Physics

ISBN: 978-0321568090

11th edition

Authors: Paul G. Hewitt

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