College Physics
2nd Edition
ISBN: 9780134601823
Author: ETKINA, Eugenia, Planinšič, G. (gorazd), Van Heuvelen, Alan
Publisher: Pearson,
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Chapter 19, Problem 45P
Home wiring A 120-V electrical line m a home is connected to a 60-W lightbulb, a 180-W television set, a 300-W desktop computer, a 1050-W toaster, and a 240-W refrigerator How much current is flowing in the line?
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Chapter 19 Solutions
College Physics
Ch. 19 - Review Question 19.1 What condition(s) is/are...Ch. 19 - Review Question 19.2 Describe the changes in...Ch. 19 - Review Question 19.3 Explain the meaning of the...Ch. 19 - Review Question 19.4 Why does it make sense that...Ch. 19 - Review Question 19.5 What experimental evidence...Ch. 19 - Review Question 19.6 Eugenia says that the power...Ch. 19 - Review Question 19.7 Where is the electric...Ch. 19 - Review Question 19.8 Rank the four identical bulbs...Ch. 19 - Review Question 19.9 What does it mean when you...Ch. 19 - Review Question 19.10 Why does the resistance of a...
Ch. 19 - Two identical bulbs are connected on parallel...Ch. 19 - Compare the potential difference across bulbs 1...Ch. 19 - Two identical bulbs are in series as shown in...Ch. 19 - 4. Which statement below about the potential...Ch. 19 - Three circuits with identical bulbs and emf...Ch. 19 - 6. Rank in order the potential differences across...Ch. 19 - 7. Rank in order the five identical bulbs in the...Ch. 19 - Four identical bulbs are shown in the circuit in...Ch. 19 - Four identical bulbs are shown in the circuit in...Ch. 19 - Consider the circuit in Figure Q19.10. The switch...Ch. 19 - 11. Figure Q19.1 shows graphs for an incandescent...Ch. 19 - If an electric current were due to electrons...Ch. 19 - 13. Three light sources (a lightbulb, a blue LED ...Ch. 19 - What is the role of a battery in an electric...Ch. 19 - 16. Compare and contrast the physical quantities...Ch. 19 - Birds on high power lines Why can birds perch on a...Ch. 19 - 18. Preventing electric shock When a person is...Ch. 19 - (a) Using a voltmeter, how can you determine the...Ch. 19 - (a) What does it mean if the current through a...Ch. 19 - 21. Resistors become warm when there is an...Ch. 19 - At one time aluminum rather than copper wires were...Ch. 19 - 23. How do you connect an ammeter in a circuit to...Ch. 19 - Why do we connect electric devices in a home in...Ch. 19 - 26. Construct an electric circuit that is...Ch. 19 - 27. Most Christmas tree lights with incandescent...Ch. 19 - 28. Two students are arguing. Student A says that...Ch. 19 - Use the laws of energy and charge conservation to...Ch. 19 - When you close the switch in the circuit in Figure...Ch. 19 - 1. A bulb in a table lamp has a current of 0.50 A...Ch. 19 - A long wire is connected to the terminals of a...Ch. 19 - A typical flashlight battery will produce a 0.50-A...Ch. 19 - 4. * Four friends each have a battery, a bulb, and...Ch. 19 - 5. Draw a circuit that has a battery, a lightbulb,...Ch. 19 - Add another battery to the circuit described in...Ch. 19 - Add another lightbulb to the circuit with one...Ch. 19 - A 9.0-V battery is connected to a resistor so that...Ch. 19 - 10. * A graph of the electric potential versus...Ch. 19 - 11. Sketch a potential-versus-location graph for...Ch. 19 - 12. Bio Electric currents in the body A person...Ch. 19 - 13. An automobile lightbulb has a 1.0-A current...Ch. 19 - * If a long wire is connected to the terminals of...Ch. 19 - Determine the current through a 2.5- resistor when...Ch. 19 - 16. * You have a circuit with a 50-Ω, a 100- Ω,...Ch. 19 - You have a circuit with a 50-, a 100- , and a 150-...Ch. 19 - 18. * A toy has two red LEDs (), two green LEDs...Ch. 19 - * You want to power a green LED (VOpenG=2.1V) and...Ch. 19 - 20. * A circuit consists of a green LED and a ...Ch. 19 - 21. * You connect a 50-Ω resistor to a 9-V battery...Ch. 19 - 22. * EST Making tea You use an electric teapot to...Ch. 19 - * If a long wire is connected to the terminals of...Ch. 19 - ** Three friends are arguing with each other. Adam...Ch. 19 - 25. * You have a 40-W lightbulb and a 100-W bulb....Ch. 19 - * Does a 60-W lightbulb have more or less...Ch. 19 - 27. * (a) Write two loop rule equations and one...Ch. 19 - 28. * (a) Write Kirchhoff's loop rule for the...Ch. 19 - 29. * Repeat parts (a) and (b) of the previous...Ch. 19 - * (a) Determine the value of 1 so that there is a...Ch. 19 - 31. ** The current through resistor in Figure...Ch. 19 - andR3 shown in Figure P19.27 satisfy the relation...Ch. 19 - 33. * (a) Write the loop rule for two different...Ch. 19 - 34. ** Determine the value of , shown in Figure...Ch. 19 - * Determine (a) the equivalent resistance of...Ch. 19 - 36. (a) Determine the equivalent resistance of...Ch. 19 - 37. * Determine the equivalent resistance of the...Ch. 19 - * Determine (a) the equivalent resistance of the...Ch. 19 - You close the switch in the circuit in Figure...Ch. 19 - * You close the switch in the circuit in Figure...Ch. 19 - 42. * Home wiring A simplified electrical circuit...Ch. 19 - 43. ** (a) Write Kirchhoff's rules for two loops...Ch. 19 - of internal resistance. Because each row has the...Ch. 19 - 45. Home wiring A 120-V electrical line m a home...Ch. 19 - * Tree lights Nine tree lights are connected m...Ch. 19 - 47. * Two lightbulbs use 30 W and 60 W,...Ch. 19 - * Three identical resistors, when connected in...Ch. 19 - . (a) Determine the power delivered to a resistor...Ch. 19 - * Determine the equivalent resistance of the...Ch. 19 - 51 toI4 from largest to smallest Assume all wires...Ch. 19 - Figure P19.52 shows a real circuit that consists...Ch. 19 - * A 100-m-long copper wire of radius 0.12 mm and...Ch. 19 - 54. * BMT subway rail resistance The BMT subway...Ch. 19 - * Thermometer A platinum resistance thermometer...Ch. 19 - As the potential difference in volts across a thin...Ch. 19 - 57. * BIO Respiration detector A respiration...Ch. 19 - * A wire whose resistance is R is stretched so...Ch. 19 - 59. * Ratio reasoning Determine the ratio of the...Ch. 19 - ** Electronics detective You need to determine the...Ch. 19 - 61. * A battery produces a 2.0-A current when...Ch. 19 - 62. * Resistance of human nerve cell Some human...Ch. 19 - 63. * Conductive textiles Metal strands can be...Ch. 19 - 64. * EST Figure P19.64 shows an I-versus-V graph...Ch. 19 - * EST Figure P19.64 shows an I-versus- V graph for...Ch. 19 - *EST Figure P19.64 shows an I-versus- V graph for...Ch. 19 - * Wiring high-fidelity speakers Your high-fidelity...Ch. 19 - 68 * BIO EST Lifting forearm by electric current...Ch. 19 - 69. * EST Switches You have a power supply, a 10-W...Ch. 19 - ** Wiring a staircase Devise an electric circuit...Ch. 19 - 72. ** EST Electric water heater An electric hot...Ch. 19 - 73. ** BIO EST The hands and arms as a conductor...Ch. 19 - 75. * A nickel wire of length L and a voltmeter...Ch. 19 - ** Solve the previous problem if the internal...Ch. 19 - * EST Figure P19.77 shows an | I | -versus-V graph...Ch. 19 - VI a. Connect a voltmeter to a batterys terminals....Ch. 19 - equaled the number of electrons passing a cross...Ch. 19 - 80. * A 5.0-A current caused by moving electrons...Ch. 19 - 81. ** BIO Current across membrane wall of axon An...Ch. 19 - BIO Signals in nerve cells stimulate muscles The...Ch. 19 - BIO Signals in nerve cells stimulate muscles The...Ch. 19 - BIO Signals in nerve cells stimulate muscles The...Ch. 19 - BIO Signals in nerve cells stimulate muscles The...Ch. 19 - 86. The horizontal 4-Ω resistors in the two...Ch. 19 - 87. Suppose nerve impulses travel at 100 m/s in...Ch. 19 - BIO Effect of electric current on human body Nerve...Ch. 19 - BIO Effect of electric current on human body Nerve...Ch. 19 - BIO Effect of electric current on human body Nerve...Ch. 19 - BIO Effect of electric current on human body Nerve...Ch. 19 - BIO Effect of electric current on human body Nerve...Ch. 19 - BIO Effect of electric current on human body Nerve...Ch. 19 - BIO Effect of electric current on human body Nerve...
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