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1 1. Electric field lines indicate A. Both direction and relative strength B. Neither direction nor strength 5. Positive charges one another. A. Repel B. Attract 2. Whether or not charges will move in a material depends partly on how tightly are held in the atoms of the material. A. Electrons B. Neutrons 6. The electric force between two objects when the distance between them decreases. A. Increases B. Decreases 3. The resistance of an insulator is A. Moderate B. High 7. Which of the following is a negatively charged particle? A. Proton B. Electron 4. Appliances connected so that they form a single pathway for charges to flow are connected in a A. Series circuit B. Parallel circuit 8. Electric field lines show the strength and of an electric field. A. Polarization B. Direction
2 9. An electric cell is a source of electric current because of a between the terminals. A. Semiconductor B. Potential Difference 13. In most cases, increasing the temperature of an object will its resistance. A. Increases B. Decreases 10. The rate at which charges move through a conductor is called A. Current B. Electrical Potential Energy 14. A circuit breaker acts as a switch creating a(n) circuit when current is too high. A. Open B. Closed 11. is the opposition posed by a material to the flow of current. A. Resistance B. Ampere 15. There is a repulsive force between two charged objects when A. Their charges are of like sign. B. They have the same number of electrons. 12. Which of the following has the lowest resistance? A. Semiconductor B. Superconductor 16. Electric force varies depending on the A. Charge and distance between charged objects. B. Charge and mass of charged objects.
3 17. Batteries typically have A. One positive and one negative terminal B. Two negative terminals 21. When there is an equal amount of positive and negative charges on an object, the object is A. Supercharged B. Neutral 18. Resistance is caused by A. Internal friction B. Electron charge 22. The electric force between charged objects is A. Either attractive or repulsive. B. Repulsive only 19. The SI unit of resistance is the A. Ohm B. Joule 23. Potential difference is measured in A. Amperes B. Volts. 20. There is an attractive force between two charged objects when A. Their charges are of unlike sign B. They have the same number of protons. 24. Current is the rate at which charges move through a(n) A. Conductor B. Insulator
4 25. A device that protects a circuit from current overload is called a A. Resistor B. Circuit Breaker 29. Where are Earth s magnetic poles are located? A. Canada and Antarctica B. at the geographic poles 26. The north pole of one magnet will be attracted to A. Another north pole B. A South Pole 30. In a magnetized substance, the domains A. Are randomly distributed. B. Line up more uniformly in one direction. 27. Magnetic force A. Is strongest near a magnet s poles. B. Is weakest near a magnet s poles 31. An electric motor and a generator are similar in that both A. Transform energy into a different form. B. Create Energy. 28. What causes a compass needle to point to geographic north? A. The pole of the compass is attracted to Earth s Geographic North Pole B. The compass needle aligns with Earth s magnetic field. 32. Generators convert A. Mechanical energy to electrical energy. B. Electrical energy to mechanical energy.
5 33. poles of a magnet repel A. Like B. Opposite 37. The magnetic field of a magnet is strongest A. At the center B. Near the poles 34. A region where a magnetic force can be detected is a(n) A. Potential circuit. B. Magnetic field. 38. Earth s magnetic field lines run from A. Geographic south to geographic North B. Magnetic east to magnetic west. 35. The north poles of two different magnets will one another. A. Attract B. Repel 39. Magnetic force is the force due to interacting A. Magnetic fields. B. poles 36. The North and South poles are not aligned exactly with the magnetic north and south poles of Earth. A. Geographic B. Migratory 40. A device that produces a magnetic field by wrapping wire into a coil is a A. Solenoid B. Domain.
6 41. The direction of the magnetic field produced by a current-carrying wire can be determined using A. The Right hand rule B. The Left hand rule 45. The north pole of one magnet will be A. Repelled by the north pole of another magnet. B. Repelled by the south pole of another magnet. 42. The magnetic field produced by a solenoid is similar to that of a A. Pole B. Bar Magnet 46. Unlike magnetic poles always A. Repel each other B. Attract each other 43. Magnetism is caused by A. Opposite Charges B. Moving Charges. 47. Groups of atoms that align to form small, magnetized regions in a material are A. Magnetic poles B. Magnetic Domains 44. An electric motor converts electrical energy into A. Mechanical Energy B. Magnetic Force 48. A device that converts electrical energy into mechanical energy is a(n) A. Generator B. Electric motor
7 49. Light travels as A. Electromagnetic waves B. Electrical waves 50. Like magnetic poles always C. Repel each other D. Attract each other
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