The magnetic field produced by a current-carrying wire is given by the formula:
\[ B = \frac{\mu_0 I}{2\pi r} \]
where:
- \( B \) is the magnetic field,
- \( \mu_0 = 4\pi \times 10^{-7} \, T \cdot m/A \) is the permeability of free space,
- \( I = 82.1 \, A \)
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