Consider a spherical shell with inner radius r1=0.40 m and outer radius r2=1.10 m. The hollow inside the shell contains no charge; and charge is distributed on the inside surface of the shell and within the shell itself, such that the electrical field inside the shell itself is everywhere outward pointing and of uniform constant magnitude 37 N/C. a) What is the charge per unit area on the inner surface at r=r1? b)What is the charge per unit volume at radius r=0.75 m (within the material 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.