What is the Magnetic Field Below an Infinite Plane of Uniform Surface Current?

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SUMMARY

The magnetic field below an infinite plane of uniform surface current, defined as K=K*j(hat), is determined using the formula B=1/4*mu(nought)*K*i(hat) for the field above the plane. The relationship between the magnetic fields above and below the plane is given by B(above) - B(below) = mu(nought)(K X n(hat)), where the cross product accounts for the discontinuity across the plane. This confirms that the magnetic field can be analyzed using symmetry and the integral of the magnetic field along a closed path.

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Electromagnetics Problem...Please Help!

Please help!

1) a magnetic field on one side of an infinite plane of uniform surface current K=K*j(hat) is found to be

B= 1/4* mu(nought)*K*i(hat)

What is the magnetic field below the plane (accounting for the discontinuity across the plane)
I think I can use the following formula:

B(above)-B(below)=mu(nought)(K X n(hat))
The X here is a cross product.

Can someone confirm this for me?
 
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The integral of the magnetic field along a closed path is proportional to the current passing through the closed path. See if you can find suitable symmetry to get what you need.
 

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