A Charge of 20 NC Is Distributed Uniformly Along the Y

question 124

Multiple Choice

A charge of 20 nC is distributed uniformly along the y axis from y = 0 to y = 4 m.Which of the following integrals is correct for the electric potential (relative to zero at infinity) at the point x = +3 m on the x axis?

• A) \(\int _ { 0 } ^ { 4 } \frac { 45 d y } { \left( y ^ { 2 } + 9 \right) ^ { 1 / 2 } }\)
• B) \(\int _ { 0 } ^ { 4 } \frac { 180 d y } { \left( y ^ { 2 } + 9 \right) ^ { 1 / 2 } }\)
• C) \(\int _ { 0 } ^ { 4 } \frac { 45 d y } { y ^ { 2 } + 9 }\)
• D) \(\int _ { 0 } ^ { 4 } \frac { 180 d y } { y ^ { 2 } + 9 }\)
• E) \(\int _ { 0 } ^ { 4 } \frac { 45 d y } { \left( y ^ { 2 } + 9 \right) ^ { 3 / 2 } }\)

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