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Consider a system of three charges shown in (Figure 1). An object with charge q4 =...

Consider a system of three charges shown in (Figure 1). An object with charge q4 = +7.0×10−9C is moved to position C from infinity (not shown in the figure). q1 = q2 = q3 = +10.0×10−8C.

A) Determine the initial electric potential energy of the system consisting of all four charges. B) Determine the final electric potential energy of the system consisting of all four charges. C) Determine the work done on the system by moving the charge q4 from infinity to point C. D) Determine the work done on the system by moving the charge q4 from infinity to point C, but for

q1 = q3 = -10.0×10−9C and q2 = +10.0×10−9C

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