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Introduction to Electricity

Introduction to Electricity. Chapter 17. Preview. CRCT Preparation. CRCT Preparation. Chapter 17. 1. The diagram shows four light bulbs wired in a circuit. What would happen if bulb 3 burned out? A Bulb 1 and bulb 2 would go out but bulb 4 will remain lit.

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Introduction to Electricity

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  1. Introduction to Electricity Chapter 17 Preview CRCT Preparation

  2. CRCT Preparation Chapter 17 1. The diagram shows four light bulbs wired in a circuit. What would happen if bulb 3 burned out? ABulb 1 and bulb 2 would go out but bulb 4 will remain lit. BBulb 2 and bulb 4 would go out but bulb 1 will remain lit. CAll of the other bulbs would go out. DAll of the other bulbs would remain lit.

  3. CRCT Preparation Chapter 17 1. The diagram shows four light bulbs wired in a circuit. What would happen if bulb 3 burned out? ABulb 1 and bulb 2 would go out but bulb 4 will remain lit. BBulb 2 and bulb 4 would go out but bulb 1 will remain lit. CAll of the other bulbs would go out. D All of the other bulbs would remain lit.

  4. CRCT Preparation Chapter 17 2. Tara rubs a balloon on her hair and charges both the balloon and her hair. What will happen if Tara holds the balloon close to her hair? AHer hair will be repelled by the balloon because her hair and the balloon have the same charge. BHer hair will be attracted to the balloon because her hair and the balloon have the same charge. CHer hair will be repelled by the balloon because her hair and the balloon are oppositely charged. DHer hair will be attracted to the balloon because her hair and the balloon are oppositely charged.

  5. CRCT Preparation Chapter 17 2. Tara rubs a balloon on her hair and charges both the balloon and her hair. What will happen if Tara holds the balloon close to her hair? AHer hair will be repelled by the balloon because her hair and the balloon have the same charge. BHer hair will be attracted to the balloon because her hair and the balloon have the same charge. CHer hair will be repelled by the balloon because her hair and the balloon are oppositely charged. D Her hair will be attracted to the balloon because her hair and the balloon are oppositely charged.

  6. CRCT Preparation Chapter 17 3. How does the electric force act within an atom? AThe electric force causes the repulsion of the negatively-charged electrons from the positively-charged nucleus. BThe electric force causes the attraction of negatively-charged electrons to the positively charged nucleus. CThe electric force holds neutrons and protons together in the nucleus. DThe electric force causes the attraction of negatively-charged electrons to each other.

  7. Chapter 17 3. How does the electric force act within an atom? AThe electric force causes the repulsion of the negatively-charged electrons from the positively-charged nucleus. B The electric force causes the attraction of negatively-charged electrons to the positively charged nucleus. CThe electric force holds neutrons and protons together in the nucleus. DThe electric force causes the attraction of negatively-charged electrons to each other.

  8. CRCT Preparation Chapter 17 4. When Andre plugs his stereo into the same outlet as the television and lamp, all three won’t work. What is the most likely hypothesis for what happened? A The circuit was overloaded, and the circuit breaker opened. B The circuit was complete, and the circuit breaker closed. C Only the stereo operates on alternating current. D The stereo’s electrical cord was faulty.

  9. CRCT Preparation Chapter 17 4. When Andre plugs his stereo into the same outlet as the television and lamp, all three won’t work. What is the most likely hypothesis for what happened? AThe circuit was overloaded, and the circuit breaker opened. B The circuit was complete, and the circuit breaker closed. C Only the stereo operates on alternating current. D The stereo’s electrical cord was faulty.

  10. CRCT Preparation Chapter 17 5. Which of the following electrical devices could be used to monitor the temperature of an engine? Aa thermocouple Ba photocell Ca dry cell Da battery

  11. CRCT Preparation Chapter 17 5. Which of the following electrical devices could be used to monitor the temperature of an engine? A a thermocouple Ba photocell Ca dry cell Da battery

  12. CRCT Preparation Chapter 17 6. A scientist measured the distance between two positively-charged objects and determined the electric force between them. Based on the data in the table, which of the following statements is true? AAs the distance between the objects increases, the size of the electric force decreases. BAs the distance between the objects increases, the objects become more positively charged. CThe size of the electric force is constant. DAs the size of the objects increases, the size of the electric force between them decreases.

  13. CRCT Preparation Chapter 17 6. A scientist measured the distance between two positively-charged objects and determined the electric force between them. Based on the data in the table, which of the following statements is true? A As the distance between the objects increases, the size of the electric force decreases. BAs the distance between the objects increases, the objects become more positively charged. CThe size of the electric force is constant. DAs the size of the objects increases, the size of the electric force between them decreases.

  14. CRCT Preparation Chapter 17 7. Suki can have all five appliances in her kitchen on at the same time, or she can have each appliance on one at a time. How are the appliances in Suki’s kitchen wired? A in a single loop Bin a direct current circuit C in a parallel circuit Din a series circuit

  15. CRCT Preparation Chapter 17 7. Suki can have all five appliances in her kitchen on at the same time, or she can have each appliance on one at a time. How are the appliances in Suki’s kitchen wired? A in a single loop Bin a direct current circuit Cin a parallel circuit Din a series circuit

  16. CRCT Preparation Chapter 17 8. How should Pedro wire four bulbs in a circuit so that all the bulbs shine as brightly as possible? AHe should wire all four bulbs in a series circuit. BHe should wire two bulbs in a parallel circuit and the other two bulbs in a series circuit. CHe should wire three bulbs in a series circuit and the other bulb in a parallel circuit. DHe should wire all four bulbs in a parallel circuit.

  17. CRCT Preparation Chapter 17 8. How should Pedro wire four bulbs in a circuit so that all the bulbs shine as brightly as possible? AHe should wire all four bulbs in a series circuit. BHe should wire two bulbs in a parallel circuit and the other two bulbs in a series circuit. CHe should wire three bulbs in a series circuit and the other bulb in a parallel circuit. D He should wire all four bulbs in a parallel circuit.

  18. CRCT Preparation Chapter 17 9. Which of the following copper wires will have the least amount of resistance? Aa short, thin wire Ba short, thick wire Ca long, thin wire Da long, thick wire

  19. CRCT Preparation Chapter 17 9. Which of the following copper wires will have the least amount of resistance? Aa short, thin wire B a short, thick wire Ca long, thin wire Da long, thick wire

  20. CRCT Preparation Chapter 17 10. Two kinds of electric current exist: direct current and alternating current. Explain the difference between these two kinds of current and give an example of where you might find each kind of current.

  21. CRCT Preparation Chapter 17 10. Answer – In direct current, the charges always flow in the same direction. In alternating current, the charges continually shift from flowing in one direction to flowing in the reverse direction. Students should give at least one example of direct current being used. Any battery-operated device, such as a flashlight or an MP3 player, is an acceptable example. Students should give at least one example of alternating current being used. Any electrical device that is plugged into an outlet, such as a lamp or a fan, is an acceptable example.

  22. CRCT Preparation Chapter 17 11. On a rainy day, David wears rubber boots to school. The floors in his math classroom are covered with carpet. After David walks across the room to the pencil sharpener, he gets a shock when he touches the sharpener. Explain why David got a shock.

  23. CRCT Preparation Chapter 17 11. Answer – When David walked across the room, his rubber boots rubbed the carpet and electrons from the carpet were transferred to David. Negative charges built up in David as static electricity. The static electricity discharged rapidly when David touched the sharpener. The discharge gave David a shock.

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