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1 March, 21:20

A solid spherical insulator has radius r = 2.5 cm, and carries a total positive charge q = 8 * 10-10 c distributed uniformly throughout its volume. find the magnitude of the electric field |e| at a radius of 5 cm from the origin (i. e., outside the sphere).

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  1. 1 March, 21:31
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    At r = 2R> R The expression for the electric field will be given by: (2R) ^2*E=kQ. Where, k = (9*10^9) N. m/C^2, Q = (8*10^-10) C and R=0.025m. So substituting and clearing, we have that the magnitude of the electric field will be: E = (9*10^9) * (8*10^-10) / ((2*0.025) ^2) = 2880 N / C.
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