3_Chapter 15 HomeworkCH15 Electric Forces and Electric Fields

3_Chapter 15 HomeworkCH15 Electric Forces and Electric Fields

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Electric Forces and Electric Fields 3 Answers to Even Numbered Conceptual Questions 2. Conducting shoes are worn to avoid the build up of a static charge on them as the wearer walks. Rubber-soled shoes acquire a charge by friction with the floor and could discharge with a spark, possibly causing an explosive burning situation, where the burning is enhanced by the oxygen. 4. Electrons are more mobile than protons and are more easily freed from atoms than are protons. 6. No. Object A might have a charge opposite in sign to that of B , but it also might be neutral. In this latter case, object B causes object A to be polarized, pulling charge of one sign to the near face of A and pushing an equal amount of charge of the opposite sign to the far face. Then the force of attraction exerted by B on the induced charge on the near side of A is slightly larger than the force of repulsion exerted by B on the induced charge on the far side of A . Therefore, the net force on A is toward B .
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