Highlight the correct answer. 1. When charging an object by friction, a. only the positive charges move from one object to the other. b. only the negative charges move from one object to the other. c. both the positive and negative charges move from one object to the other. d. neither the positive nor the negative charges move from one object to the other. 2. When an object becomes polarized, a. only the positive charges move within the object. b. only the negative charges move within the object. c. both the positive and negative charges move within the object. d. neither the positive nor the negative charges move within the object. 3. Based upon what you saw in this lab, then, it can be said that a. positive charges are stationary within objects. b. negative charges are stationary within objects. c. positive charges are mobile within objects. d. negative charges are mobile within objects. e. both a and b foth a and d g. both b and c
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When charging an object by friction, the correct answer is **b. only the negative charges move from one object to the other.** This typically occurs due to the transfer of electrons, which are negatively charged, as one material rubs against another, leading to static electricity. In the case of polarization, the correct answer is **c. both the positive and negative charges move within the object.** When an external electric field is applied, the charges within an object can shift slightly, creating regions of positive and negative charge, even though the total charge remains neutral overall. As for the lab conclusions, based on experiments typically performed, the correct choice is **e. both a and b.** In most conductive materials, while electrons can flow freely (making negative charges mobile), the positive charges (such as the atomic nuclei) remain fixed in place, contributing to the overall structure of the material.