A small sphere of charge q = +66 μC and mass m = 5.4 g is attached to a light string and placed in a uniform electric field E that makes an angle = 33° with the horizontal. The opposite end of the string is attached to a wall and the sphere is in static equilibrium when the string is horizontal as in the figure shown below. E 0

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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.