Question: A plastic rod has been bent into a circle of radius R = 8.20 cm. It has a charge Q1 = + 4.20pC uniformly distributed

A plastic rod has been bent into a circle of radius R = 8.20 cm. It has a charge Q1 = + 4.20pC uniformly distributed along one-quarter of its circumference and a charge Q2 = ?? 6Q1, uniformly distributed along the rest of the circumference (Figure). With V = 0 at infinity, what is the electric potential

(a) At the center C of the circle and

(b) At point P, which is on the central axis of the circle at distance D = 6.71cm from the center?

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