Consider the long thin semi-infinite non-conducting rod shown in the figure above. It lies on the
x-axis with the left end located a distance n2d from the origin. The linear charge
density of the rod decreases as 1/xn1 where x is the distance from the
origin. The expression for the linear
charge density is &lambda = C/xn1, where C is a constant. What is the
magnitude of the electric field at the origin? That is if |E| = (1/n3)
kC/dn1+1, what is n3?
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