I don't need the questions that are circled answered or questions 64-71
51, Which two of the resistor arrangemer 54.) The diagram below shows two resistors connected to a 20.-volt battery 58. In the circuit diagram below, ammeter A measures the current supplied by a 10. volt have the same equivalent resistance? 5.012 15.0 02 battery. 63. The diagram below represents currents in branches of an electric circuit. 10 M A 10.A- -15A 10.V 240.0 $40.12 MA 20. V 89 The current measured by ammeter A is 8A - If the current through the 5.0-ohm resistor is What is the reading on ammeter A? M 1.0 ampere, what is the current through the (1) 0.13 A (2) 2.0 A (3) 0.50 A (4) 4.0 A 59. A physics student is given three 12-ohm resistors 64. An immersion heater has a resistance of 5.0 15.0-ohm resistor? ohms while drawing a current of 3.0 amperes. 55, The diagram below shows a circuit with three with instructions to create the circuit that would What is the total electrical energy delivered to 20 2 42 resistors. have the lowest possible resistance. The correct circuit would be a the heater during 4.0 minutes of operation? MA R1-400 87-600 (1) 1.8 x 102 J (1) series circuit with an equivalent resistance of (2) 3.6 x 10" J (3) 1.1 x 10" J MMM 36 0 (4) 5.4 x 10"J 2) series circuit with an equivalent resistance of 65. In a simple circuit, two 3.0-ohm resistors are 24-volt 40 connected in series to a 12-volt battery. The rate 20 source 204 3) parallel circuit with an equivalent resistance at which electrical energy is expended in this of 36 02 circuit is (1) 6.0 W (2) 12 W (3) 24 W (4) 36 W What is the resistance of resistor R,? 4) parallel circuit with an equivalent resistance of 4 0 66. Which combination of current and potential (1) A and B (3) C and D (1) 6.0 0 (2) 2.0 0 (3) 120 (4) 40n so. Which circuit could be used to determine the difference would use energy at the greatest (2) B and C (4) D and A 56. An electric circuit contains an operating heating total current and potential difference of a rate? 52. Which circuit would have the lowest voltmeter element and a lit lamp. Which statement best parallel circuit? (1) 7 A at 110 V (3) 3 A at 220 V (2) 6 A at 110 V reading? explains why the lamp remains lit when the (4) 4 A at 220 V 6-V 6-V heating element is removed from the circuit? (1) (3) 67. How much time is required for an operating source source (1) The lamp has less resistance than the heating 100-watt incandescent lightbulb to dissipate 20 0 element. 10 joules of electrical energy? (2) The lamp has more resistance than the (1) 1s (2) 0.1 s (3) 10 s 20 0 40 0 heating element. A (4) 1000 s TWT 3) The lamp and heating element are 2) 68. While operating at 120 volts, an electric toaster MT (4) MM 40 9 connected in series. has a resistance of 15 ohms. The power used by the toaster is (3) 4) The lamp and heating element are connected in parallel. 61, Which diagram below shows correct current (1) 8.0 W (2) 120 W (3) 960 W (4) 1800 W direction in a circuit segment? 6-V 6-V source source 57. A 10.-ohm resistor and a 5.0-ohm resistor are 69. An electric dryer consumes 6.0 x 10 joules 5 A 20 92 connected as shown in the diagram below. S A 5 A of energy when operating at 220 volts for 30. minutes. During operation, the dryer draws a 10. 02 current of 20 $2 40 92 40 0 2A 2A 2A 2A (1) 10. A (2) 15 A (3) 20. A (4) 25 A WW 5.0 42 3 A 3 A 70. What is the total amount of electrical energy (1) (21 (3) (4) (2) (4) needed to operate a 1600-watt toaster for 60. seconds? 53. The circuit diagram below shows three 62. The diagram below shows currents in a segment (1) 27 J (2) 1500 J (3) 1700 J (4) 96,000 J voltmeters connected across resistors. If the current through the 10.-ohm resistor of an electric circuit. TMT is 1.0 ampere, then the current through the 6A 71. To increase the brightness of a desk lamp, a student replaces a 60-watt incandescent 110-V 5.0-ohm resistor is 20V -5A- +2A- source (1) 15 A (2) 2.0 A (3) 0.50 A (4) 0.30 A lightbulb with a 100-watt incandescent lightbulb. Compared to the 60-watt lightbulb, the 100-watt lightbulb has (1) less resistance and draws more current 20 V What is the reading of ammeter A? (2) less resistance and draws less current What is the reading of voltmeter Vz? (3) more resistance and draws more current (4) more resistance and draws less current 130 Topic 4 Electricity and Magnetism Topic 4: Electricity and Magnetism 131
