Two small identical conducting spheres are placed with their centers 0.30 m apart. One is given a charge of 12 x 10–9 C, the other a charge of –18 x 10–9 C. (a) Find the electrostatic force exerted on one sphere by the other. (b) The spheres are connected by a conducting wire. Find the electrostatic force between the two after equilibrium is reached.

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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.