vsage
Nov1-04, 04:56 PM
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
B_1 = \frac{\mu_0i_i}{2\pi r_1}
B_1 = \frac{2\times 8}{\sqrt{0.1^2+0.005^2}}
= 1.598e-5 T roughly. Multiplied this by 2 since equal currents/radii in both wires. Vertical components cancel so I multiplied by \frac{0.1}{\sqrt{0.1^2+0.005^2}} to get 3.192e-5 T. Where did I go wrong?
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
B_1 = \frac{\mu_0i_i}{2\pi r_1}
B_1 = \frac{2\times 8}{\sqrt{0.1^2+0.005^2}}
= 1.598e-5 T roughly. Multiplied this by 2 since equal currents/radii in both wires. Vertical components cancel so I multiplied by \frac{0.1}{\sqrt{0.1^2+0.005^2}} to get 3.192e-5 T. Where did I go wrong?