Currents in dc transmission lines can be 100 A orhigher. Some people are concerned that the electromagnetic fieldsfrom such lines near their homes could pose health dangers.

Part A

For a line that has current 190 A and a heightof 8.0 m above the ground, what magnetic field doesthe line produce at ground level? Express your answer inteslas.

B =

T

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Part B

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

Express your answer using two significant figures.

BBE =

9

%

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Part C

Is this value of magnetic field cause for worry?

Is this value of magnetic field cause for worry?

No. Since this field is does not differ a lot from theearth's magnetic field, it would be expected to have almost thesame effect as the earth’s field.

Yes. Since this field is does not differ a lot from theearth's magnetic field, it would be expected to have almost thesame effect as the earth’s field.

Yes. Since this field is much greater than the earth'smagnetic field, it would be expected to have more effect than theearth’s field.

No. Since this field is much smaller than the earth'smagnetic field, it would be expected to have less effect than theearth’s field.

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a i current in the line 190 A distance of the ground from the line 8 m Magnitude o... View the full answer