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Applies to questions of primarily educational value - not only questions that arise from actual homework assignments, but any question where it is preferable to guide the asker to the answer rather than giving it away outright. Please READ THE GUIDANCE IN META before asking homework-like questions.

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Electric field due to a line charge

From the image you can see that i've attemted to calculate electric field due to a straight conductor at a point P ,to which the perpendicular distance is r, in three ways . 1) I'm integrating with re …