We can use the formula for the magnetic field due to a straight wire:
$$B = \frac{\mu_0 I}{2 \pi R}$$
Where $B$ is the magnetic field, $\mu_0$ is the permeability of free space ($4\pi \times 10^{-7} Tm/A$), $I$ is the current, and $R$ is the distance from the
Show more…