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physics

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a small conducted sphere is attached to the end of an insulating rod .it carries a charge of +5.0*10-9 C. the plates ,which are 4.0 cm apart, are connected to a 50 000 V supply.

Calculate
a)the magnitude of the electric field strenghen between the plates
b)the magnitude of the force on the sphere ,treated as a point charge of +5.0*10-9

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