You are standing directly under a high-voltage power line that is 4.5m above you

Question

You are standing directly under a high-voltage power line that is 4.5m above you, and a detailed map that you have indicates that the power line runs exactly north to south. Your compass needle makes an angle of 32 degrees to the east with respect to the power line's direction.

a)Knowing that the magnitude of the Earth's magnetic field is approximately 5.0*10^-5 T, determine the magnitude and direction of the magnetic field produced by the power line at ground level.
b)How much current is being carried by the power line? c)Is the current flowing toward the north or toward the south?

Explanation / Answer

magnitude of earths magnetic field is B = 5 *10 -5 T = 50 T

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