A semicircle of radius a is chargedpositive charge q is, Ask an Expert

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A semicircle of radius a is charged.positive charge +Q is distributed uniformaly around the left half of the semicircle and negative charge -Q distributed around right half of the semicircle

a) what are the magnitude and the direction of the electric field at the origin

B) if we now place a charge q at the origin what would be the force exerted on it

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