r = 5 π m
i = 4A
µ0 = 4π. 10^-7 T
B = µ0*i/2R
B = 4π. 10^-7 * 4 / ( 2 * 5 π)
B = 16 . 10^-8
B = 1,6 . 10^-7 T
2-
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r = 5 π m
i = 4A
µ0 = 4π. 10^-7 T
B = µ0*i/2R
B = 4π. 10^-7 * 4 / ( 2 * 5 π)
B = 16 . 10^-8
B = 1,6 . 10^-7 T
2-