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Two point charges (+10.0 nC and −10.0 nC) are located 8.00 cmapart. Let U =...

Two point charges (+10.0 nC and −10.0 nC) are located 8.00 cm apart. Let U = 0 when all of the charges are separated by infinite distances. What is the potential energy if a third point charge q = −7.41 nC is placed at point a?

8.00 cm 8.00 cm 14.00 +4.00 +4.00 cm cm cm


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Answer #1

net energy

U = k q ( q1/ d1 + q2/d2)

U = 9* 10^9* (-7.41* 10^-9)* 10^-9* ( 10 / 0.04 - 10 / 0.12)

U = - 11.1 uJ

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