Question: A point charge q1 is at the origin and a second point charge q2 is on the x axis at x = a as in

A point charge q1 is at the origin and a second point charge q2 is on the x axis at x = a as in Example 24-5.

(a) Calculate the electric field everywhere on the x axis from the potential function given in that example.

(b) Find the potential at a general point on the y axis.

(c) Use your result from (b) to calculate the y component of the electric field on the y axis. Compare your result with that obtained directly from Coulomb's law.

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