There has been some concern in recent years over the possible health effects fro

Question

There has been some concern in recent years over the possible health effects from magnetic fields generated by transmission lines. Suppose a transmission line is suspended 19 meters overhead by a tower and carries 1,666 A of current. The Earth's magnetic field on the surface is approximately 5.0 Times 10^-5 T. What percentage of the Earth's magnetic field is the field produced on the ground by the transmission lines? In the previous question, what can you say about the dangers of magnetic fields due to transmission lines?

Explanation / Answer

magnetic field B = uoi/2pi R

B = (4* 3.14 e -7 * 1666)/(2*3.14 * 19)

B = 1.753 e -5 Tesla

B/Be = 1.753 e -5/5 e -5

B/Be = 35.06 %

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option1, magnetic field lines are lesss danger than Earths magnetic field

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