A nonuniform linear charge distribution given by ?(x) = bx, where b is a constant, is distributed along the x axis from x = 0 to x = +L. If b = 40 nC/m2 and L = 0.20 m, what is the electric potential (relative to a potential of zero at infinity) at the point y = 2L on the y axis?
A. 19 V
B. 17 V
C. 21 V
D. 23 V
E. 14 V
Answer: B
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