Respostas

2013-07-23T16:24:37-03:00
Campo magnetico (B) = (mi * i / L ) * n

mi = 4pi*10^-7 T*m/A
1mA = 1*10^-3A

20cm = 0,2m= 2*10^-1 m

Adotando Pi=3


B = 4*10^-7 *  10^-3 * 2*10^2 / 2*10^-1

B = 12 * 10^-8 * 2 / 2*10^-1

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B= 12 * 10^-7 T
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