Three Particles Lie on the X Axis: Particle 1, with a Charge

question 10

Multiple Choice

Three particles lie on the x axis: particle 1, with a charge of 1 * 10^-8 C is at x = 1 cm, particle 2, with a charge of 2 *10^-8 Cis at x = 2 cm, and particle 3, with a charge of -3 *10^-8 C, is at x = 3 cm. The potential energy of this arrangement, relative to the potential energy for infinite separation, is:

• A) +4.9 *10^-4 J
• B) -4.9 *10^-4 J
• C) +8.5* 10^-4 J
• D) -8.5 *10^-4 J
• E) zero

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