Two thin rods of length l lie along the x-axis one between

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Two thin rods of length L lie along the x-axis, one between x=a/2 and x=a/2+L and the other between x= - a/2 and x= - a/2 - L. Each rod has positive charge Q distributed uniformly along its length.

1)Assuming a >> L, find the magnitude of this force reduces to. (Hint: Use the expansion ln(1+z)= z - z^2/2+z^3/3 - ...), valid for |z| <<1. Carry all expansions to at least order L^2/a^2.)

2) What does the result of 1) mean?

Reference no: EM13583000

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