Points A, B, and C are at the corners of an equilateral triangle of side 3 m.

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Points A, B, and C are at the corners of an equilateral triangle of side 3 m. Equal positive charges of 2 μC are at A and B.

(a) What is the potential at point C?

(b) How much work is required to bring a positive charge of 5 μC from infinity to point C if the other charges are held fixed?

(c) Answer parts (a) and (b) if the charge at B is replaced by a charge of –2 μC.

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