Prelab 3: Electric Potential Difference Name: 1 . Three point charges, -1 nC, -1 nC, and +2 nC, are arranged in an equilateral triangle as shown. If the -1 nc charge on the lower left is -1 nc removed to infinity, would the potential energy of the 3-particle system increase, decrease, or remain the same? Explain. (Note: "Removed to infinity" means that an external agent, for example a person's hand, d d moves the -1 nC point charge away until it is a very large distance from both of the other two charges.) O -1 nc d +2 nc 2 . Two "source" charges +q. and -q. are fixed in place at the positions shown. Four locations A, B, C, and D are labeled on the diagram. a. Rank, from highest to lowest, the electric potentials at points A-D. Gq Explain your reasoning. A D B C b. A positive probe charge is now moved from point A to point B. Is the work done on the probe charge by the electric field due to the source charges positive, negative, or zero? Explain. . Is the change in electrical potential energy positive, negative, or zero? Explain.Prelab 3: Electric Potential Difference Name: 1 . Three point charges, -1 nC, -1 nC, and +2 nC, are arranged in an equilateral triangle as shown. If the -1 nc charge on the lower left is -1 nc removed to infinity, would the potential energy of the 3-particle system increase, decrease, or remain the same? Explain. (Note: "Removed to infinity" means that an external agent, for example a person's hand, d d moves the -1 nC point charge away until it is a very large distance from both of the other two charges.) O -1 nc d +2 nc 2 . Two "source" charges +q. and -q. are fixed in place at the positions shown. Four locations A, B, C, and D are labeled on the diagram. a. Rank, from highest to lowest, the electric potentials at points A-D. Gq Explain your reasoning. A D B C b. A positive probe charge is now moved from point A to point B. Is the work done on the probe charge by the electric field due to the source charges positive, negative, or zero? Explain. . Is the change in electrical potential energy positive, negative, or zero? Explain