16. Two identical particles, each with charge q, are placed onthe x axis, one at

Question

16. Two identical particles, each with charge q, are placed onthe x axis, one at the origin and the other at x = 5 cm. A third particle, with charge –q, isplaced on the x axis so the potential energy of the three-particle system is the same as thepotential energy at infinite separation. Its x coordinate is: A) 13 cm B) 2.5 cm C) 7.5 cm D) 10 cm E) –5 cm 16. Two identical particles, each with charge q, are placed onthe x axis, one at the origin and the other at x = 5 cm. A third particle, with charge –q, isplaced on the x axis so the potential energy of the three-particle system is the same as thepotential energy at infinite separation. Its x coordinate is: A) 13 cm B) 2.5 cm C) 7.5 cm D) 10 cm E) –5 cm

Explanation / Answer

     Given that the charges are q1=q2 = q and q3 = -q

     The separation between the twocharges is d = 5cm = 0.05 m

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