A solid sphere of radius a is centered at the origin. It is made of an insulating material and carries a uniform charge density with total charge Qi. It is surrounded by a hollow, concentric conducting shell of inner radius b and outer radius c. The outer shell has total charge Q2. Qi = +10 µC Q5 μC a = 5 cm b = 15 cm c = 20 cm Qi b.

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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.