A stright line segment of length 2L is placed on the z-axis with its midpoint at the origin. The segment has a linear charge density given by...(adsbygoogle = window.adsbygoogle || []).push({});

[tex] \lambda = \frac{aQ}{z^2 + a^2} [/tex]

where Q and a are constants, a>0 find the electrostatic potential of this charge distribution at a point on the x-axis in Cartesian coords.

[tex] \Phi = \int_{-L}^{L} \frac{k_e dt \frac{aQ}{t^2+a^2}}{\sqrt{x^2 + t^2}}[/tex]

[tex] = k_e Q a \int_{-L}^{L} \frac{dt}{(t^2 +a^2) \sqrt{t^2 + x^2}} [/tex]

what do now?....no idea what subsitution will make this work,any suggestions?

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# Homework Help: New intregral same old problem

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