According to Ampère's law, a current-carrying wire produces a magnetic field around it. The magnetic field \( B_1 \) at a distance \( d \) from wire 1 due to current \( I_1 \) is given by:
\[ B_1 = \frac{\mu_0 I_1}{2\pi d} \]
where \( \mu_0 \) is the
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