- #1

ShotgunMatador

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## Homework Statement

Two long parallel wires are a center-to-center distance of 1.10 cm apart and carry equal anti-parallel 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}= 3.868e-5 T but it is telling me that is wrong.

Thanks for any help, it is greatly appreciated.