A long, round wire of radius a and conductivity is coated with a material of conductivity...

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A long, round wire of radius a and conductivity is coated with a material of conductivity 0.10. a) What must be the thickness of the coating so that the resistance per unit length of the uncoated wire is reduced by 50%? b) Assuming a total current I in the coated wire, find J and E in both the core and the coating material. A long, round wire of radius a and conductivity is coated with a material of conductivity 0.10. a) What must be the thickness of the coating so that the resistance per unit length of the uncoated wire is reduced by 50%? b) Assuming a total current I in the coated wire, find J and E in both the core and the coating material.

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a The resistance per unit length of the uncoated wire is given by Rwire wire Awire where wire is the ... View the full answer