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Problema 57. Capítulo 24 del Serway. Séptima Edición. Página 690.
Problem 69. Chapter 24 from Serway. Sixth Edition. Page 760.
Una distribución de carga de simetría esférica tiene una densidad de carga expresada por ρ = a/r, siendo a una constante. Determine el campo eléctrico como una función de r.
A spherically symmetric charge distribution has a charge density given by ρ = a/r, where a is constant. Find the electric field as a function of r. (Suggestion: The charge within a sphere of radius R is equal to the integral of ρ d V, where r extends from 0 to R. To evaluate the integral, note that the volume element d V for a spherical shell of radius r and thickness d r is equal to 4 π r2d r.)
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