B_{1} = 2 \cdot 10^{- 7} \frac{N}{A^{2}} \cdot \frac{100 A}{1 m} = 2 \cdot 10^{- 5} T = 20 μ T

${B_1 = 2 \cdot 10^{-7} \frac{\text{N}}{\text{A}^2} \cdot \frac{100 \text{A}}{1 \text{m}} = 2 \cdot 10^{-5} \text{T} = 20 \mu \text{T}}$

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