Using Eqs. 2.27 and 2.30, find the potential at a distance z above the center of the
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Using Eqs. 2.27 and 2.30, find the potential at a distance z above the center of the charge distributions in Fig. 2.34. In each case, compute E = – ∆V, and compare your answers with Prob. 2.2a, Ex. 2.1, and Prob. 2.6, respectively. Suppose that we changed the right-hand charge in Fig. 2.34a to –q; what then is the potential at P? What field does that suggest? Compare your answer to Prob. 2.2b, and explain carefully any discrepancy.
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+ą 2L +q (a) Two point charges (b) Uniform line charge (c) Uniform surface charge
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