A spherical, non-conducting shell of inner radius = 10 cm (r1) and outer radius = 15 cm (r2) carries a total charge Q = 15 ?C distributed uniformly throughout the volume of the shell. What is the magnitude of the electric field at a distance r = 12 cm from the center of the shell?

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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.