1.  Consider a long straight,

timer Asked: Dec 15th, 2015

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1.  Consider a long straight, thick copper wire with a radius of 2 cm carrying 500 Amps of current. Use Ampere's law to find the strength of the magnetic field at a distance r from the center of the wire both when r is less than 2 cm (inside the wire) and when r is more than 2 cm (outside the wire). Make a graph of the field strength as a function of distance. Then explain why the magnetic force inside the wire will produce a force pulling electrons towards the center of the wire. You may assume that the current is evenly distributed throughout the wire.

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