The figure below shows the cross section of a long metal rod of radius R=30mm. The rod carries a current I=5kA directed out of the paper. Find B at point P(r-20mm) and at the surface of the rod, assuming that the permeability of the metal may be approximated as µo and the current through the rod is unform.
The figure below shows the cross section of a long metal rod of radius R=30mm. The rod carries a current I=5kA directed out of the paper. Find B at point P(r-20mm) and at the surface of the rod, assuming that the permeability of the metal may be approximated as µo and the current through the rod is unform.
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Transcribed Image Text:4. The figure below shows the cross section of a long metal rod of radius R=30mm. The rod carries
a current I=5kA directed out of the paper. Find B at point P(r=20mm) and at the surface of the
rod, assuming that the permeability of the metal may be approximated as µo and the current
through the rod is unform.
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