Question: Consider the electric dipole of Example 21.15. (a) Derive an expression for the magnitude of the electric field produced by the dipole at a point

Consider the electric dipole of Example 21.15.
(a) Derive an expression for the magnitude of the electric field produced by the dipole at a point on the x-axis in Fig. 21.34. What is the direction of this electric field?
(b) How does the electric field at points on the x-axis depend on x when x is very large?

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