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Data: L = 3.142 m, N = 1000, I = 5A, μ0 = 4π × 10-7 T∙m/A The magnetic induction, B = μ0 nI = μ0(\(\frac{N}{L}\))I = (4π × 10-7)(\(\frac{1000}{3.142}\))(5) = \(\frac{20 \times 3.142 \times 10^{-4}}{3.142}\) = 2 × 10-3 T
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