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AdsBerger
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Homework Statement
A current of 5 A is passed through a single wire loop, producing a magnetic field of 3.4 x 10^-3 T at the center. What is the radius of the loop?
Homework Equations
B = μNi / 2r
The Attempt at a Solution
B = 3.4 x 10^-3
N = 1
i = 5
B = μNi / 2r
3.4 x 10^-3 = (__)(1loop)(5 A) / 2r
what is this u variable ? what does it represent