Respostas

2014-01-22T19:51:47-02:00
Resposta

B = Uo*i/2pi*d
B = 4*10^-7pi*5 /2pi*0,2
B = 20*10^-7 / 0,4
B = 50
*10^-7
B = 0,5*10^-5 T
1 5 1