At the northern magnetic pole (roughly at Latitude 80.1 N,Longitude 107.41 West), the Earth's magnetic field has a magnitude5.71 x 10-5T, and points straight down into the "frozentundra." If you assume that all of this field is due to a currentloop around the center of the Earth, 3000 miles in diameter, whatdoes the current have to be?

Hint: Don't forget to use consistent units.

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