Three charges are located in the x-y plane (see plot below), with Q 1 = 5.00 ?C,

Question

Three charges are located in the x-y plane (see plot below), with Q1 = 5.00 ?C, Q2 = -3.00 ?C and Q3 = -5.00 ?C. Note that the charges are located at grid intersections points.

Calculate the total work required (by external forces) to transport Q2 and Q3 from their location to infinity.

Three charges are located in the x-y plane (see plot below), with Q1 = 5.00 ?C, Q2 = -3.00 ?C and Q3 = -5.00 ?C. Note that the charges are located at grid intersections points. Calculate the total work required (by external forces) to transport Q2 and Q3 from their location to infinity.

Explanation / Answer

Potential energy of system = 8.98*10^9*5*10^-6*3*10^-6/6 + 8.98*10^9*5*10^-6*5*10^-6/4 - 8.98*10^9*5*10^-6*3*10^-6/sqrt(4^2+6^2) = 0.05989 J

Final PE = 0

Workdone = 0.05989 J

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