(adsbygoogle = window.adsbygoogle || []).push({}); Magnetism: Magnetic field between wires

Two long parallel wires are a distance of d = 1 cm apart and carry equal antiparallel currents of 8 Amperes. Find the magnetic field intensity (in T) at the point P which is equidistant from the wires. (R = 10 cm).

This should be easy but I haven't gotten it right so far (as if that means it's hard). Here's what I did

[tex]B_1 = \frac{\mu_0i_i}{2\pi r_1}[/tex]

[tex]B_1 = \frac{2\times 8}{\sqrt{0.1^2+0.005^2}}[/tex]

= 1.598e-5 T roughly. Multiplied this by 2 since equal currents/radii in both wires. Vertical components cancel so I multiplied by [tex] \frac{0.1}{\sqrt{0.1^2+0.005^2}}[/tex] to get 3.192e-5 T. Where did I go wrong?

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# Homework Help: Magnetism: Magnetic force between wires

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