What is the electric potential energy of the group of charges in (Figure 1)? Assume that q=-2.0 nC

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What is the electric potential energy of the group of charges in (Figure 1)? Assume that q=-2.0 nC

Part A

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Answer 1

Answer #1

In general when there is a system of N charges then to calculate the electric potential energy of the system, we need to sum the energies of each pair of charges formed (not repeated)

Given

Q = 3.0 nC

q = -2.0 nC

Let r1 = 3.0 cm

r2 = 4.0 cm

then, r3 = 5.0 cm

Now the potential energy of the system would be:

is the required answer

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Answer 2

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What is the electric potential energy of the group of charges in (Figure 1)? Assume that q=-2.0 nC