Shown below is a small sphere of mass 0.25 g that carries charge of 0.90 nC. The sphere is attached to one end of a very thin silk string 5.0 cm long. The other end of the string is attached to a large, thin, vertical conducting plate with surface charge density of 30.0 μC/m2. When another thin vertical large plate with uniformly distributed negative charge is brought close to the small sphere (but not touching), ? increases for additional 5.000. Determine the surface charge density on the negative plate.

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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.