Chapter 23, Problem 12Q

Suppose the charged ring of Example 23–8 was not uniformly charged, so that the density of charge was twice as great near the top as near the bottom. Assuming the total charge Q is unchanged, would this affect the potential at point P on the axis (Fig. 23–14)? Would it affect the value of $\stackrel{\to }{E}$ at that point? Is there a discrepancy here? Explain.