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Parad0x88
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Homework Statement
Niobium metal becomes a superconductor when cooled below 9 K. Its superconductivity is destroyed when the magnetic field inside the superconductor exceeds 0.100 T. Determine the maximum current a 3.00-mm-diameter niobium wire can carry and remain fully superconducting, in the absence of any external magnetic field.
Homework Equations
So we know if B > 0.1 T, the superconductor is destroyed, thus we have to find an I that will not make it exceed such figure. The formula I was thinking of using is:
B = (μ0I)/(2∏r)
r = 1.5 mm, or 0.00015m
B = 0.100 T
Solve for I
The Attempt at a Solution
Solving for I: (B2∏r)/(μ0) = I
Does that make sense? I can't find much info in my book about superconductors to guide me