Three concentric spherical conductive shells of radii 5 cm, 10 cm, and 15 cm are charged with 7 μC, 15 μC, and -22 μC, respectively. What is the electric field at r=2.5 cm, r=12 cm, and r=20 cm? E1 =  V/m, E2=  V/m, E3=  V/m. What are the electric potentials at these points? V1 =  V, V2=  V, V3=  V.

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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.