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A hollow metal sphere has inner radius a, outer radius b, and conductivity sigma. The current I is radially outward from the inner surface to the outer surface.

a) Find an expression for the electric field strength inside the metal as a function of the radius r from the center.

b) Evaluate the electric field strength at the inner surface of a copper sphere if 0.70cm and 28A.

c) Evaluate the electric field strength at the outer surface of a copper sphere if 2.9cm and 28A?

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Category:- Physics
Reference No.:- M9897599

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