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r= 6 cm= 6x10^-2 m
N= 400= 4x10²
I= 10 A
Ditanya
B=...?
Jawab
uo x I x N (4πx10^-7)(10)(4x10²)
B= -------------- = ------------------------------- = 2x10^-2 T
2πr 2π(6x10^-2)