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i = __ ?
a = 20 m
gaya Lorentz antara 2 kawat lurus panjang berarus listrik
F/L = μ₀ i₁ i₂ / (2π a)
100 = 4π×10⁻⁷ · i² / (2π · 20)
100 = 2×10⁻⁷ · i² / 20
i² = 100 × 20 / 2×10⁻⁷
i² = 10¹⁰
i = 10⁵ A ← jwb
[besar benar ??]