Niobium metal becomes a superconductor when cooled below 9
Chapter 30, Problem 30(choose chapter or problem)
Niobium metal becomes a superconductor when cooled below 9 K. Its superconductivity is destroyed when the surface magnetic field exceeds 0.100 T. In the absence of any external magnetic field, determine the maximum current a 2.00-mm-diameter niobium wire can carry and remain superconducting.
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