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(a) Determine the electrostatic potenti...

(a) Determine the electrostatic potential energy of a system consisting of two charge `7 muC and -2 muC` (and with no external filed) placed at `(-9 cm, 0,0) and (9 cm, 0,0)` respectively.
(b) How much work is required to seprare the two charges infinitely away from each other ?
(c) Suppose that the same system of charges is now placed in an external electric field `E = A xx 1//r^(2)`, where `A = 9xx10^(5) C m^(-2)`.
What would the electrostatic energy of the configuration be ?

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a. Determine the electrostatic potential energy of a system consisting of two charges 7 muC and -2muC (and with no external field) placed at (-9 cm, 0,0) and (9 cm, 0, 0) respectively. b. How much work is required to separate the two charges infinitely away from each other? c. Suppose that the same system of charges is now placed in an external electric field E=A (1/r^(2)) , A =9 xx 10^(5) Cm^(-2) . What would the electrostatic energy of the configuration be?