Question

Two equal but opposite charges of +1.0 nC and −1.0 nC are held fixed at locations...

Two equal but opposite charges of +1.0 nC and −1.0 nC are held fixed at locations
(x, y)=(0.0 cm,1.0 cm) and (x, y)=(0.0 cm,−1.0 cm). Points A, B, and C have coordinates (x, y)=(0.0 cm,2.0 cm), (x, y)=(0.0 cm,−2.0 cm), and (x, y)=(2.0 cm,0.0 cm), respectively, as shown in the above right figure.

a) What is the electric potential energy of the two-charge system.
b) Calculate the electric potential at points A, B, and C.
c) Rank in order, from largest to smallest, the potentials VA, VB, and VC.

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