Suppose the conducting spherical shell in the figure below carries a charge of 2.80 nC and that a charge of −2.40 nC is at the center of the sphere. If a = 1.80 m and b = 2.40 m, find the electric field at the following. (a)    r = 1.50 m magnitude     N/C direction      radially inward /radially outward /The magnitude is zero. (b)    r = 2.20 m magnitude     N/C direction      ---Select--- radially inward /radially outward /The magnitude is zero. (c)    r = 2.50 m magnitude     N/C direction      ---Select--- radially inward /radially outward /The magnitude is zero.

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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.