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October 20, 2014

Homework Help: Physics

Posted by Phy on Friday, April 5, 2013 at 5:42am.

A long coaxial cable consists of two concentric conductors. The inner conductor is a cylinder with radius R_1, and it carries a current I_0 uniformly distributed over its cross section. The outer conductor is a cylindrical shell with inner radius R_2 and outer radius R_3. It carries a current I_0 that is also uniformly distributed over its cross section, and that is opposite in direction to the current of the inner conductor. Calculate the magnetic field {B} as a function of the distance R from the axis.

What is the direction and magnitude of the magnetic field for 0<r<R_1? Express your answer in terms of I_0, R_1, R_2, R_3, r and \mu _0 (enter mu_0 for \mu _0)

What is the direction and magnitude of the magnetic field for R_1<r<R_2? Express your answer in terms of I_0, R_1, R_2, R_3, r and \mu _0 (enter mu_0 for \mu _0)

What is the direction and magnitude of the magnetic field for R_2<r<R_3? Express your answer in terms of I_0, R_1, R_2, R_3, r and \mu _0 (enter mu_0 for \mu _0)

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