P30_002 - 2. The current i due to the electron ow is i = ne...

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2. The current i due to the electron flow is i = ne =(5 . 6 × 10 14 / s)(1 . 6 × 10 19 C) = 9 . 0 × 10 5 A. Thus, B = µ 0 i 2 πr = (4 π × 10
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