How far from the starter cable of a car, carrying 170 A, must you be to experience a field less than the Earth's (4.85 x 10-5

Question

How far from the starter cable of a car, carrying 170 A, must you be to experience a field less than the Earth's (4.85 x 10-5 T)? Assume a long, straight wire carries the current. (In practice, the body of your car shields the dashboard compass.)

Kunduz · Accepted Answer

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