EMF. Currents in dc transmission lines can be 100 Aor more. Some people have exp

Question

EMF. Currents in dc transmission lines can be 100 Aor more. Some people have expressed concern that the electromagnetic fields (EMFs) from such lines near their homes could cause health dangers.

For a line with current 180A and at a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? Express your answer in teslas....correct ans is 4.5*10^-6 T

What magnetic field does the line produce at ground level as a percent of the earth's magnetic field, which is 0.50 gauss.

B/Be=9% i figured it out

Explanation / Answer

magnetic fiedl on the surface of the earth is 0.5*10^-4 T

B/Be = 4.5/0.5 = 0.09 = 9%

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