- #1
Saitama
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Homework Statement
Find the current density as a function of distance ##r## from the axis of a radially symmetrical parallel stream of electrons if the magnetic induction inside the stream varies as ##B=br^a##, where ##b## and ##a## are positive constants.
Homework Equations
The Attempt at a Solution
Honestly, I don't have any idea for this problem. I don't see any equations in my notes which relates the B-field and current density.
Any help is appreciated. Thanks!