Suppose both charges in Fig. 21-45 (for a dipole)
Chapter 21, Problem 21.64(choose chapter or problem)
Suppose both charges in Fig. 21-45 (for a dipole) werepositive, (a) Show that the field on the perpendicularbisector, for r , is given by (l/477e0)(2<2/r2). (b) Explainwhy the field decreases as 1/r2 here whereas for a dipole itdecreases as 1/r3.
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