P30_069 - 69. Since the radius is R = 0.0013 m, then the i...

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69. Since the radius is R =0 . 0013 m, then the i = 50 A produces B = µ 0 i 2 πR =0 . 0077 T at the edge of the wire. The three equations, Eq. 30-6, Eq. 30-19 and Eq. 30-22, agree at this point.
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