A solid insulating sphere of radius R has a uniform charge density p. (a) What is the total charge of the sphere? (b) What is the magnitude of the electric field inside the sphere at a distance R/2 measure from the center of the sphere? (c) Find the distance (in terms of R) from that center of the sphere where the magnitude of the electric field is half of the magnitude of the electric field at the surface?

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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.