A wire running parallel to the $x-$axis comes from a long way away to the $z-$axis at the point $z_0=3\mathrm{.}00m.$ It then makes a turn and travels along the $z-$axis until it reaches the origin. Then it makes another turn to follow the $y-$axis up to the point $y_0=2\mathrm{.}00m.$ It makes one last turn into the negative $x-$direction and continues until it is a long way away.

If the wire carries a $289$ mA current, determine the magnitude of the magnetic field on the $x-$axis at the point $x_0=4\mathrm{.}00m.$

Note you may need this: ${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}[y^2+a^2{]}^{-\frac{3}{2}}dy=\frac{y}{a^2\sqrt[\phantom{2}]{y^2+a^2}}$

$2\mathrm{.}93$ nT

$2\mathrm{.}97$ nT

$2\mathrm{.}91$ nT

$2\mathrm{.}95$ nT

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