Conceptual Evaluation Problem 9: hich of the following describes an experiment t

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Conceptual Evaluation Problem 9: hich of the following describes an experiment that demonstrates that there are at least two different types of electric charge? Select One of the Following (a) Rub of the same material for example, glass one pair of rods made with felt. Observe that the glass rods repel one another. (b) Charge a pair each of glass and rubber rods by rubbing them with felt. Observe that that (1) the glass rods repel each other, (2) the glass rods attract the rubber rods, and (3) the rubber rods repel each other. (c) Charge a pair each of glass and quartz rods by rubbing them with felt. observe that that (1) the glass rods repel each other, (2) the quartz rods repel the glass rods, and (3) the quartz rods repel each other. blem 10: Is it possible for a charged object to exert an electric force on an uncharged piece of tissue paper? Select the answer with the best explanation. Select One of the Following (a) Yes, by inducing an electrical polarization in the tissue; the tissue then attracted to the charged object (b) Yes, by inducing an electrical polarization in the tissue; the tissue then repelled by the charged object. (c) No, because uncharged objects do not feel electrical forces. (d) No, because tissue paper is an insulator rather than a conductor

Explanation / Answer

problem 9

b

problem 10

a

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