Question: A long, thin conducting cylindrical shell carries a positive charge +Q on its outer surface. We now rotate the cylinder at a constant angular

A long, thin conducting cylindrical shell carries a positive charge +Q on its outer surface. We now rotate the cylinder at a constant angular velocity w. The equivalent surface current density is K = ov, where v is the velocity of charges on the surface, v=r@. a. A magnetic field arises. Why? b. Calculate the magnetic field both inside and outside the spinning cylinder.

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