A Charge of 4 $\int _ { 4 } ^ { 6 } \frac { 18 d x } { 4 - x }$

A charge of 4.0 nC is distributed uniformly along the x axis from x = +4 m to x = +6 m.Which of the following integrals is correct for the electric potential (relative to zero at infinity) at the origin?

A) $\int _ { 4 } ^ { 6 } \frac { 18 d x } { 4 - x }$
B) $\int _ { 4 } ^ { 6 } \frac { 36 d x } { x }$
C) $\int _ { 4 } ^ { 6 } \frac { 18 d x } { x }$
D) $\int _ { 4 } ^ { 6 } \frac { 36 d x } { 6 - x }$
E) $\int _ { 4 } ^ { 6 } \frac { 36 d x } { 4 + x }$

Correct Answer:

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