Feb15-11, 11:20 PM
Electric charge is distributed uniformly along a thin rod of length a, with total charge Q. Take the potential to be zero at infinity. Find the potential at the following points: P is distance x from (0,0) which is the right side of the rod.
Find the potential at the point P, a distance to the right of the rod.
In part A, what does your result reduce to as x becomes much larger than a?
answer from A.
So as x becomes larger than a, (moves toward infinity)V should reduce to zero. The ln's should cancel eachother out, leaving you to multiply by 0. Except 0 is not excepted.
According to the software, the answer depends on x, and does not depent on a.
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