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1. Two pointlike charges of Q1 and Q3 are
located at (0, 0.15m) and (0.30m, 0) as
shown in the right figure. Q=+1 µC,
Q3=-3 µC. (a) Find the total electric
potential at the origin produced by the two
pointlike charges (Q1 and Q3) in the figure.
(b) Find the electric potential energy on a
charge of Q,=-1µC placed at the origin.
Q=1 v c
0.15 m
0.30 m
QF-3 C

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