To test whether a material is a superconductor, a scientist decides to make a ring out of

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To test whether a material is a superconductor, a scientist decides to make a ring out of the material and then to see whether a current will flow around in the ring with no steady energy input.
(a) Explain how a magnet could be used to initiate the current.
(b) At some later time, how could the scientist check to see whether the current is still flowing in the ring without touching the ring?
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Inquiry into Physics

ISBN: 978-1305959422

8th edition

Authors: Vern J. Ostdiek, Donald J. Bord

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