p101chap12pretest - Chapter 12 Electrostatic Phenomena 1 An...

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Chapter 12: Electrostatic Phenomena 1. An electron situated near another electron would feel A. a repulsive electrical force. B. an attractive electrical force. C. a repulsive magnetic force. D. an attractive magnetic force. E. no forces from the other electron. Answer: A 2. Consider a proton and an electron placed near one another with no other objects close by. They would A. accelerate away from each other. B. remain motionless. C. accelerate toward each other. D. be pulled together at constant speed. E. move away from each other at constant speed. Answer: C 3. Compared to the magnitude of the charge on a proton, the magnitude of the electrical charge carried by an electron is A. about the same. B. exactly the same. C. is only ½ as large. D. is only as large. Answer: B 4. The charge of a proton is due to A. physicists are not yet quite sure but explain charge as a property of the proton. B. periodic pulsations of the surface of the proton. C. the high density of the proton. D. rapid spinning of the proton. Answer: A 5. Two equal positive charges are near each other. If we increase the amount of charge on just one of them, then A. both charges feel an increased electrical force. B. only smaller charge feels an increased electrical force. C. the electric field felt by both charges increases. D. the electric field felt by the smaller charge increases. E. Both answers A and D Answer: E
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6. An atom has A. just as many electrons as protons. B. no neutrons in the nucleus. C. more protons than electrons. D. as many electrons as protons and neutrons combined. E. at least 1 neutron. Answer: A 7. A strip of fur is rubbed against a hard rubber rod. The rod thereby acquires a negative charge because A. frictional forces create electrons. B. rubbing caused electrons to move from the fur to the rod. C. friction caused protons to be removed from the rod. D. electrons from the air molecules are transferred to the rod. Answer: B 8. The electrical force between two charged objects depends on A. the mass of the objects. B. the color of the objects. C. the amount of combined charge of both objects. D. the amount of charge on each of the two objects. E. which object has the greatest charge. Answer: D 9. The electrical force between any two charged objects is A. always attractive. B. always repulsive. C. always balanced by the action-reaction forces. D.
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p101chap12pretest - Chapter 12 Electrostatic Phenomena 1 An...

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