Positive charge Q is distributeduniformly along the x axis fromx = -a/2 to x = +a/2. Point Pis on the x axis at x = r wherer > a/2. The diagram shows asegment of the line of charge at adistance x from the origin. Thelength of this segment is dx andits charge is dQ.аа20 dx2(a) Show that the contribution to the electric potential at P due to the element of charge dQ is1 Q dxdV4TE, ar – xYou may add to the diagram above if that is helpful.(b) Calculate V at P due to the entire line of charge. Appendix B of your text contains useful integrals.(c) Find an approximate expression for V if r » a and explain why your result seems reasonable.

Let Q denotes the positive charge distributed over the length a, r denotes the distance of point P…

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