Question 07/02
CURRENT IN A WIRE
In freshman physics we are told that a current in an "infinite" cylindrical wire
flows with constant density J independent of this distance from the center
of the wire. But we also learn how to use Ampere's Law to calculate the magnetic field in the wire.
Doesn't the magnetic field act to make the current density non-uniform?
This problem has been suggested by B. Svetitsky.
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