Question

suppose a piece of coaxial cable is made with a solid wire at the center. A metal cylinder has a common center with wire and its radius is 1 mm. A 2 A current flows up the center wire and a 1.5 A current flows down the cylinder.

1. Find the B-field at 4mm from the center.
2.5 x 10^-5 T
2. Find the B-field at 0.5mm from the center.
8 x 10^-4 T
3. what current should be in the cylinder to have no B-field outside of the cylinder?
-2A

Answer 1

Answer:

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