QUIZ 1. In identifying a volt as a change in electrical potential energy, what are its units? a. Joules b. Joule-coulombs c. Coulombs d. Joules per coulomb Answer: d. The units of the volt are in joules per coulomb; these represent the change in potential energy as it relates to the charge of an electrical object. 2. In electricity, what is the best description of the voltage of something? a. A measure of a system’s potential energy b. A measure of its difference in potential energy between two points c. A measure of the potential energy and kinetic energy of the system d. A measure of the potential energy minus the kinetic energy of the system Answer: b. This is a measure of the difference in potential energy between two points with one point given an arbitrary zero voltage point. 3. What is the relationship between the electric potential of a point charge and the distance from the charge? a. The electric potential is proportional to the distance from the point charge. b. The electric potential is proportional to the square of the distance from the point charge. c. The electric potential is inversely proportional to the distance from the point charge. d. The electric potential is inversely proportional to the square of the distance from the point charge.
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