A rod (length = 2.0 m) is uniformly charged and has a total charge of 5.0 nC. What is the electric potential (relative to zero at infinity) at a point which lies along the axis of the rod and is 3.0 m from the center of the rod?
A. 22 V
B. 19 V
C. 16 V
D. 25 V
E. 12 V
Answer: C
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