A charge Q is uniformly distributed along the x axis from x = a to x = b. If Q = 45 nC, a = ?3.0 m, and b = 2.0 m, what is the electric potential (relative to zero at infinity) at the point, x = 8.0 m, on the x axis?
A. 71 V
B. 60 V
C. 49 V
D. 82 V
E. 150 V
Answer: C
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