22.45 •• CALC An insulating hollow sphere has inner radius a and outer radius b. Within the insulating material the volume charge density is given by p (r) = «/r, where a is a positive constant. (a) In terms of a and a, what is the magnitude of the electric field at a distance r from the center of the shell, where a

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.