- #1
SimbaTheLion
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Homework Statement
Question 3 of http://www.damtp.cam.ac.uk/user/examples/B10b.pdf .
Homework Equations
[itex]\nabla \times B = \mu_0 J[/itex]
The Attempt at a Solution
I know for a cylinder, J (vector) = J (scalar) * k (vector), where unit k is the vector in the z-direction. So [itex]\nabla \times B = (0, 0, \mu_0 J)[/itex], somewhere (not quite sure where this is true in terms of a, b, d). I think I need to find B for the big cylinder, then B for the small cylinder, and combine them somehow? I don't see why the field in between the cylinders is important; we're only interested in B for x² + y² < a².
Thanks!