 #1
 8
 0
Homework Statement
Two long parallel wires are a centertocenter distance of 1.10 cm apart and carry equal antiparallel currents of 9.70 A. Find the magnitude of the magnetic field at the point P which is equidistant from the wires. (R = 10.00 cm). (See Attachment for orientation)
I = 9.7 A
Distance from current source = √(.1^{2}+(.011/2)^{2}) = 10.015 cm
Homework Equations
B_{infinite wire}= μ_{i}*I/2*pi*r
The Attempt at a Solution
Knowing the upper wire's magnetic field rotates counterclockwise and the lower wire rotates clockwise using RHR 2. So the y components at point P are equal but opposite. So we know the magnitude at Point P is going to be 2 times the x component of the magnetic field produced by either wire, which is represented as...
B_{total}=2*μ_{i}*I*cos(θ)/(2*π*√(.1^{2}+(.011/2)^{2}))
where cos(θ) = .1/√(.1^{2}+(.011/2)^{2}))
So B_{total} = 3.868e5 T but it is telling me that is wrong.
Thanks for any help, it is greatly appreciated.
Attachments

23.2 KB Views: 456