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college physics

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A long, straight, cylindrical wire of radius R carries a current uniformly distributed over its cross section.

1. At what location is the magnetic field produced by this current equal to quarter of its largest value? Consider points inside the wire.

2.At what location is the magnetic field produced by this current equal to quarter of its largest value? Consider points outside the wire.

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    What is the difference between questions 1 and 2?

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