Niobium metal becomes a superconductor (with electrical resistance equal to zero) when cooled below 9 K. If superconductivity is destroyed when the surface magnetic field exceeds 0.100 T, determine the maximum current a 2.00-mm diameter niobium wire can carry and remain superconducting. (µ0 = 4p × 10^-7 T×m/A)
a. 2000 A
c. 125 A
b. 1000 A
d. 500 A
D
Physics & Space Science
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