24 clicker questions
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This document contains a series of multiple choice questions about magnetism and magnetic fields. The questions cover topics such as the interaction between magnetic poles, the source of magnetism, magnetic forces, magnetic domains, and applications of magnetism like electric meters and the Earth's magnetic field.
24 clicker questions
- 1. Clicker Questions Chapter 24: Magnetism © 2015 Pearson Education, Inc.
- 2. For magnets, like poles repel each other and unlike poles a) also repel each other. b) attract each other. c) can disappear into nothingness. d) can carry a lot of energy. © 2015 Pearson Education, Inc.
- 3. For magnets, like poles repel each other and unlike poles a) also repel each other. b) attract each other. c) can disappear into nothingness. d) can carry a lot of energy. © 2015 Pearson Education, Inc.
- 4. The source of all magnetism is a) tiny bits of iron. b) tiny domains of aligned atoms. c) the motion of electrons. d) small lodestones. © 2015 Pearson Education, Inc.
- 5. The source of all magnetism is a) tiny bits of iron. b) tiny domains of aligned atoms. c) the motion of electrons. d) small lodestones. Comment: This is true for electrons moving in a beam or electrons spinning or orbiting the nuclei of atoms such as iron. © 2015 Pearson Education, Inc.
- 6. A strong magnet lifts a paper clip. Compared with the force the magnet exerts on the clip, the force the clip exerts on the magnet is a) much less. b) slightly less. c) the same. d) slightly more. © 2015 Pearson Education, Inc.
- 7. A strong magnet lifts a paper clip. Compared with the force the magnet exerts on the clip, the force the clip exerts on the magnet is a) much less. b) slightly less. c) the same. d) slightly more. Explanation: This is Newton's third law. In the interaction between the paper clip and the magnet, both forces are equal and opposite. © 2015 Pearson Education, Inc.
- 8. Magnet A has twice the field strength of Magnet B. When brought close together, the magnet that pulls harder on the other is a) Magnet A. b) Magnet B. c) Both forces are equally strong. d) dependent on their distances apart. © 2015 Pearson Education, Inc.
- 9. Magnet A has twice the field strength of Magnet B. When brought close together, the magnet that pulls harder on the other is a) Magnet A. b) Magnet B. c) Both forces are equally strong. d) dependent on their distances apart. Explanation: This is Newton's third law–the force that A exerts on B is equal and opposite to the force that B exerts on A. © 2015 Pearson Education, Inc.
- 10. Surrounding moving electric charges are a) electric fields. b) magnetic fields. c) Both of these. d) None of these. © 2015 Pearson Education, Inc.
- 11. Surrounding moving electric charges are a) electric fields. b) magnetic fields. c) Both of these. d) None of these. Comment: Don't forget that electric fields surround electric charges! © 2015 Pearson Education, Inc.
- 12. The magnetic domains in a magnet produce a weaker magnet when the magnet is a) heated. b) dropped on a hard surface. c) Either of these. d) None of these. © 2015 Pearson Education, Inc.
- 13. The magnetic domains in a magnet produce a weaker magnet when the magnet is a) heated. b) dropped on a hard surface. c) Either of these. d) None of these. © 2015 Pearson Education, Inc.
- 14. Magnetic domains occur mainly for materials composed of a) carbon. b) copper. c) silver. d) iron. © 2015 Pearson Education, Inc.
- 15. Magnetic domains occur mainly for materials composed of a) carbon. b) copper. c) silver. d) iron. © 2015 Pearson Education, Inc.
- 16. A bar magnet that holds a chain of paper clips illustrates a) magnetic field displacement. b) magnetic induction. c) electromagnetic induction. d) Faraday's law. © 2015 Pearson Education, Inc.
- 17. A bar magnet that holds a chain of paper clips illustrates a) magnetic field displacement. b) magnetic induction. c) electromagnetic induction. d) Faraday's law. © 2015 Pearson Education, Inc.
- 18. When a bar magnet is broken in half, the magnetic strength of each piece is a) less than half. b) about half. c) the same. d) somewhat increased. © 2015 Pearson Education, Inc.
- 19. When a bar magnet is broken in half, the magnetic strength of each piece is a) less than half. b) about half. c) the same. d) somewhat increased. Explanation: This is detailed in Figure 24.7 in the textbook. © 2015 Pearson Education, Inc.
- 20. A superconducting electromagnet makes use of a) low-resistance coils of wire. b) super-high temperatures. c) high-speed electrons. d) close packing of high-density magnetic domains. © 2015 Pearson Education, Inc.
- 21. A superconducting electromagnet makes use of a) low-resistance coils of wire. b) super-high temperatures. c) high-speed electrons. d) close packing of high-density magnetic domains. © 2015 Pearson Education, Inc.
- 22. The magnetic field lines about a current- carrying wire form a) circles. b) radial lines. c) eddy currents. d) spirals. © 2015 Pearson Education, Inc.
- 23. The magnetic field lines about a current- carrying wire form a) circles. b) radial lines. c) eddy currents. d) spirals. © 2015 Pearson Education, Inc.
- 24. A magnetic force cannot act on an electron when it a) is at rest. b) moves parallel to magnetic field lines. c) Both of these. d) None of these. © 2015 Pearson Education, Inc.
- 25. A magnetic force cannot act on an electron when it a) is at rest. b) moves parallel to magnetic field lines. c) Both of these. d) None of these. Explanation: A force is exerted on charged particles only when they move at an angle to magnetic field lines. The force is greatest when motion is at right angles to the magnetic field. © 2015 Pearson Education, Inc.
- 26. A magnetic force acts most strongly on a current-carrying wire when it a) carries a very large current. b) is perpendicular to the magnetic field. c) Either or both of these. d) None of the above. © 2015 Pearson Education, Inc.
- 27. A magnetic force acts most strongly on a current-carrying wire when it a) carries a very large current. b) is perpendicular to the magnetic field. c) Either or both of these. d) None of the above. © 2015 Pearson Education, Inc.
- 28. The fact that a force is exerted on a current- carrying wire in a magnetic field underlies a) motors. b) electric meters. c) Both of these. d) None of these. © 2015 Pearson Education, Inc.
- 29. The fact that a force is exerted on a current- carrying wire in a magnetic field underlies a) motors. b) electric meters. c) Both of these. d) None of these. © 2015 Pearson Education, Inc.
- 30. An electric meter operates on the principal that a current-carrying wire or coil will a) interact with a magnetic field. b) deflect away from a magnetic field. c) be attracted to a magnet. d) induce a magnetic field when near a magnet. © 2015 Pearson Education, Inc.
- 31. An electric meter operates on the principal that a current-carrying wire or coil will a) interact with a magnetic field. b) deflect away from a magnetic field. c) be attracted to a magnet. d) induce a magnetic field when near a magnet. © 2015 Pearson Education, Inc.
- 32. Surrounding our Planet Earth are a) radiation belts. b) cosmic rays. c) gravitational and magnetic fields. d) All of these. © 2015 Pearson Education, Inc.
- 33. Surrounding our Planet Earth are a) radiation belts. b) cosmic rays. c) gravitational and magnetic fields. d) All of these. © 2015 Pearson Education, Inc.
- 34. A magnetic force acting on a beam of electrons can change a) only the direction of the beam. b) only the energy of the electrons. c) both the direction and the energy. d) neither the direction nor the energy. © 2015 Pearson Education, Inc.
- 35. A magnetic force acting on a beam of electrons can change a) only the direction of the beam. b) only the energy of the electrons. c) both the direction and the energy. d) neither the direction nor the energy. © 2015 Pearson Education, Inc.
- 36. The magnetic field surrounding Earth a) helps shield us from cosmic rays. b) is likely caused by electric currents in its interior. c) changes over time. d) All of these. © 2015 Pearson Education, Inc.
- 37. The magnetic field surrounding Earth a) helps shield us from cosmic rays. b) is likely caused by electric currents in its interior. c) changes over time. d) All of these. © 2015 Pearson Education, Inc.
- 38. Earth's magnetic poles and geographical poles occur a) atop each other. b) about 1000 miles apart. c) in northern Canada. d) beneath ice caps. © 2015 Pearson Education, Inc.
- 39. Earth's magnetic poles and geographical poles occur a) atop each other. b) about 1000 miles apart. c) in northern Canada. d) beneath ice caps. © 2015 Pearson Education, Inc.
- 40. Magnetic materials are found in the bodies of a) bees. b) birds. c) bacteria. d) All of these. © 2015 Pearson Education, Inc.
- 41. Magnetic materials are found in the bodies of a) bees. b) birds. c) bacteria. d) All of these. © 2015 Pearson Education, Inc.