Two charges lie on the x axis, +2q at the origin, and ?3q at x = 5.0 m. The point on the x axis where the electric potential has a zero value (when the value at infinity is also zero) is
A. 1.0 m.
B. 2.0 m.
C. 2.5 m.
D. 3.0 m.
E. 4.0 m.
Answer: B
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