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?

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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?

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