Three charges are located at the vertices of a triangle, as
shown.
+5 c
which vector best represents the net force acting on the
+4 c charge in the diagram?
+4
+10c
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Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?