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B = 10⁻⁵ T
μ₀ = 4π x 10⁻⁷
I = ........?
Penyelesaian :
μ₀ • I
B = _______
2π • a
4π x 10⁻⁷ • I
10⁻⁵ = ______________
2π • 0,05
10⁻⁵ = 4 x 10⁻⁶ • I
I = 2,5 A
Jadi, besar kuat arus yang mengalir adalah 2,5 A