Applied Physics (11th Edition)
11th Edition
ISBN: 9780134159386
Author: Dale Ewen, Neill Schurter, Erik Gundersen
Publisher: PEARSON
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Textbook Question
Chapter 17, Problem 47RQ
If the voltage and current in a circuit each decrease by a factor of 2, how does the power change?
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Chapter 17 Solutions
Applied Physics (11th Edition)
Ch. 17.3 - Two identical charges, each -8.0010-5C are...Ch. 17.3 - The force of repulsion between two identical...Ch. 17.3 - A charge of +3 010-6C exerts a force of 940 N on a...Ch. 17.3 - A charge of -3.010-8 C exerts a force of 0 045 N...Ch. 17.3 - When a -9.0-C charge is placed 0.12 cm from a...Ch. 17.3 - How far apart are two identical charges of +6.00 C...Ch. 17.3 - Three charges are located along the x-axis. Charge...Ch. 17.3 - Three charges are located along the x-axis Charge...Ch. 17.4 - An electric field has a positive test charge of...Ch. 17.4 - What is the field magnitude of an electric field...
Ch. 17.4 - An electric field exerts a force of 2 5010-4 N on...Ch. 17.4 - An electric field exerts a force of 3.0010-4 N on...Ch. 17.4 - An electric field of magnitude 0.450 N/C exerts a...Ch. 17.4 - An electric field of magnitude 0.370 N/C exerts a...Ch. 17.4 - What force is exerted on a test charge of 3.8610-5...Ch. 17.4 - What force is exerted on a test charge of 4.0010-5...Ch. 17.5 - Prob. 1PCh. 17.5 - Find the resistance of 315 ft of No. 24 copper...Ch. 17.5 - Prob. 3PCh. 17.5 - Prob. 4PCh. 17.5 - Prob. 5PCh. 17.5 - Prob. 6PCh. 17.5 - Prob. 7PCh. 17.5 - Prob. 8PCh. 17.5 - Prob. 9PCh. 17.5 - Find the length of a copper wire with resistance...Ch. 17.6 - A heating element operates on 115 V. If it has a...Ch. 17.6 - Prob. 2PCh. 17.6 - Prob. 3PCh. 17.6 - A heating coil operates on 220 V. If it draws 15.0...Ch. 17.6 - Find the resistance that draws 0.750 A on 115 V.Ch. 17.6 - What current does a75.0- resistance draw on 115 V?Ch. 17.6 - A heater operates on 220 V If it draws 12.5 A,...Ch. 17.6 - What current does a 50.0- resistance draw on 115...Ch. 17.6 - What current does a 175- resistance draw on 220VCh. 17.6 - A heater draws 3.50 A on 115 V. What is its...Ch. 17.6 - (a) What current does a 150- resistance draw on a...Ch. 17.6 - Prob. 12PCh. 17.6 - Electric characteristics of all consumer electric...Ch. 17.6 - What is the effective resistance of a television...Ch. 17.6 - Find the current used by a stereo with resistance...Ch. 17.6 - What is the current used by a microwave oven with...Ch. 17.7 - Three resistors of 2.00, 5.00, and 6.50 are...Ch. 17.7 - Find the current in Problem 1.Ch. 17.7 - Find the equivalent resistance in the circuit...Ch. 17.7 - Find the current through R2 in Problem 3 Figure...Ch. 17.7 - Find the current in the circuit shown in Fig....Ch. 17.7 - Find the voltage drop across R1 in Problem 5...Ch. 17.7 - What emf is needed for the circuit shown in Fig....Ch. 17.7 - Find the voltage drop across R3, in Problem 7...Ch. 17.7 - Find the equivalent resistance in the circuit...Ch. 17.7 - Find R3, in the circuit in Problem 9. Figure 17.34Ch. 17.7 - Find the values of R1. R2 and R3 in Fig. 17.35...Ch. 17.7 - Find the values of V1, R2, and V3 in Fig. 17.36....Ch. 17.7 - Find the values of R1, V2, and R3 in Fig. 17.37....Ch. 17.8 - (a) Find the equivalent resistance in the circuit...Ch. 17.8 - (a) Find l2 (currant through R2) in the circuit...Ch. 17.8 - (a) Find the resistance off R3 in the circuit in...Ch. 17.8 - (a) What is the equivalent resistance in the...Ch. 17.9 - (a) Which resistances are connected in parallel?...Ch. 17.9 - Prob. 2PCh. 17.9 - Prob. 3PCh. 17.9 - Find the voltage drop across R1. Figure 17.55Ch. 17.9 - Prob. 5PCh. 17.9 - What is the equivalent resistance of the...Ch. 17.9 - Prob. 7PCh. 17.9 - Prob. 8PCh. 17.9 - What is the voltage drop across the parallel part...Ch. 17.9 - Prob. 10PCh. 17.9 - Find the current through R5. Figure 17.56Ch. 17.9 - What is the voltage drop across R3? Figure 17.56Ch. 17.9 - Prob. 13PCh. 17.9 - Find the equivalent resistance of the parallel...Ch. 17.9 - Prob. 15PCh. 17.9 - What emf is required for the given current flow in...Ch. 17.9 - Find the voltage drop across the parallel...Ch. 17.9 - Find the voltage drop across R4. Figure 17.57Ch. 17.9 - Find the voltage drop across R6. Figure 17.57Ch. 17.9 - Prob. 20PCh. 17.9 - Figure 17.58 Use Fig. 17.58 in Problems 21 through...Ch. 17.9 - Find the current through R5. Figure 17.58 Use Fig....Ch. 17.9 - Find the voltage drop across R5. Figure 17.58 Use...Ch. 17.9 - Find the voltage drop across R4. Figure 17.58 Use...Ch. 17.9 - Find the current through R2. Figure 17.58 Use Fig....Ch. 17.10 - Prob. 1PCh. 17.10 - Prob. 2PCh. 17.10 - Prob. 3PCh. 17.10 - Prob. 4PCh. 17.10 - Prob. 5PCh. 17.10 - Prob. 6PCh. 17.10 - Prob. 7PCh. 17.10 - Prob. 8PCh. 17.10 - Prob. 9PCh. 17.10 - Prob. 10PCh. 17.10 - Prob. 11PCh. 17.12 - A cell has an emf of 1.50 V and an internal...Ch. 17.12 - Prob. 2PCh. 17.12 - The emf of a battery is 12 0 V. If the internal...Ch. 17.12 - Prob. 4PCh. 17.12 - Prob. 5PCh. 17.12 - Find the current in the circuit shown in Fig....Ch. 17.12 - Find the current in the circuit shown in Fig....Ch. 17.12 - Prob. 8PCh. 17.12 - Find the current in the circuit shown in Fig. 17...Ch. 17.12 - Find the total resistance in the circuit shown in...Ch. 17.13 - A heater draws 8.70 A on a 110-V line. What is its...Ch. 17.13 - What power is needed for a sander that draws 3.50...Ch. 17.13 - How many amperes will a 75.0-W lamp draw on a...Ch. 17.13 - Prob. 4PCh. 17.13 - How many amperes will a 750-W lamp draw on a 110-V...Ch. 17.13 - Find the cost to operate the lamp in Problem 5 for...Ch. 17.13 - Six 50.0-W bulbs are operated for 25.0 h on a...Ch. 17.13 - A small furnace uses 3.00 kW of power. If the cost...Ch. 17.13 - Will a 20.0-A fuse blow if a 1000-W hair dryer, a...Ch. 17.13 - How long could you operate a 1000-W soldering iron...Ch. 17.13 - Prob. 11PCh. 17.13 - Prob. 12PCh. 17.13 - Find the cost of operating a 3.00-A motor on a...Ch. 17.13 - How many amperes will a 60-W lamp draw on a 110-V...Ch. 17.13 - Using the following table, list two different...Ch. 17.13 - Using the preceding table, list two different...Ch. 17.13 - Find the power output of a cell phone charger that...Ch. 17.13 - A power supply for electronic devices delivers...Ch. 17.13 - At what rate does a light bulb convert electric...Ch. 17.13 - What power is used by a light that draws 2.00 A...Ch. 17.13 - How much electric energy (in joules) is delivered...Ch. 17.13 - A car has a 12.0-V battery. If the current through...Ch. 17.13 - (a) How much power does a television use if it...Ch. 17.13 - Prob. 24PCh. 17.13 - A digital timer is used on a 115-V line. (a) If...Ch. 17.13 - A current of 230 A is delivered to a truck starter...Ch. 17.13 - A job site generator delivers 205 A in 15.0 s in a...Ch. 17 - The atomic particle that carries a positive charge...Ch. 17 - The atomic particle that carries a negative charge...Ch. 17 - The process by which an object becomes charged...Ch. 17 - The process by which an object becomes permanently...Ch. 17 - The resistance of a wire is dependent on all of...Ch. 17 - Which of the following are good electric...Ch. 17 - The total resistance in a circuit containing...Ch. 17 - The current in a parallel circuit is given by a....Ch. 17 - The emf of a battery with cells connected in...Ch. 17 - The current in a battery with cells connected in...Ch. 17 - The current in a battery with cells connected in...Ch. 17 - Examples of dry cells include. a. lead-zinc cells....Ch. 17 - In your own words, describe how materials can...Ch. 17 - What particles make up an atom?Ch. 17 - What particles are located in the nucleus (center)...Ch. 17 - Where are electrons located in an atom?Ch. 17 - What are the two types of charge? What atomic...Ch. 17 - Describe the process of charging an electroscope...Ch. 17 - Describe the process of charging an electroscope...Ch. 17 - In your own words, describe Coulombs law of...Ch. 17 - Describe an electric field.Ch. 17 - Describe lightning.Ch. 17 - The flow of electrons through a conductor is...Ch. 17 - (a) The unit of current is the ______. (b) The...Ch. 17 - What effect does doubling the diameter of a wire...Ch. 17 - In your own words, explain Ohm s law.Ch. 17 - Differentiate between a series and a parallel...Ch. 17 - Differentiate between the equivalent resistance in...Ch. 17 - In using an electric instrument, with what range...Ch. 17 - Explain how a parallel water system compares to a...Ch. 17 - How does the current change in a circuit if the...Ch. 17 - How does the current change in a circuit if the...Ch. 17 - How would the resistance of a wire change if the...Ch. 17 - Explain the concept of electric potential.Ch. 17 - Explain the transfer of energy that occurs in a...Ch. 17 - Distinguish between a primary and a secondary...Ch. 17 - Explain recharging.Ch. 17 - Describe the function of an electrolyte.Ch. 17 - In your own words, describe the manner in which a...Ch. 17 - What is the effect of the internal resistance of a...Ch. 17 - The unit of electric power is the ____________.Ch. 17 - In your own words, explain the relationship among...Ch. 17 - Do we pay the utility company for our power use or...Ch. 17 - Explain the relationship among power, voltage, and...Ch. 17 - If the current in a circuit is increased by a...Ch. 17 - If the resistance in a circuit decreases by a...Ch. 17 - If the voltage and current in a circuit each...Ch. 17 - If the current increases in a circuit by a factor...Ch. 17 - Two charges, each -4.50 C, are 0.150 cm apart....Ch. 17 - The repulsive force between two identical negative...Ch. 17 - A charge of 2.50 10-8 C exerts a force of 0.0250...Ch. 17 - A positive test charge of 2.50 C is placed in an...Ch. 17 - Find the magnitude of the electric field in which...Ch. 17 - What force is exerted on a test charge of 4.25 ...Ch. 17 - Prob. 7RPCh. 17 - Prob. 8RPCh. 17 - Prob. 9RPCh. 17 - Prob. 10RPCh. 17 - Find the cross-sectional area of copper wire at...Ch. 17 - A heating element operates on 115 V. If it has a...Ch. 17 - A heating coil operates on 220 V. If it draws 8.75...Ch. 17 - What current does a 234- resistance draw on 115 V?Ch. 17 - Four resistors of 3.40 , 6.54 , 8.32 , and 1.34 ...Ch. 17 - Find the current in Problem 15.Ch. 17 - Find the emf in the circuit shown in Fig. 17.78....Ch. 17 - Find the equivalent resistance in the circuit...Ch. 17 - Prob. 19RPCh. 17 - Find the equivalent resistance in the circuit...Ch. 17 - Find the current in Fig. 17 80. Figure 17.80Ch. 17 - Find the current through R1 in Fig. 17.80. Figure...Ch. 17 - Find the current through R2 in Fig. 17.80. Figure...Ch. 17 - Prob. 24RPCh. 17 - Find the current through R3 in Fig. 17.81. Figure...Ch. 17 - Find the current through R1 in Fig. 17.81; through...Ch. 17 - Find the equivalent resistance in Fig. 17.82....Ch. 17 - Prob. 28RPCh. 17 - Find the voltage drop across R5 in Fig. 17.82....Ch. 17 - Prob. 30RPCh. 17 - Find the voltage drop across R1 in Fig. 17.82....Ch. 17 - Figure 17.83Ch. 17 - A cell has an emf of 1.44 V and an internal...Ch. 17 - Prob. 34RPCh. 17 - Prob. 35RPCh. 17 - Find the current in the circuit shown in Fig....Ch. 17 - Find the total resistance in the circuit shown in...Ch. 17 - What power is needed for a drill that draws 2.45 A...Ch. 17 - How many amperes will a 150-W light bulb draw on a...Ch. 17 - What is the cost to operate the lamp in Problem 39...Ch. 17 - If the cost of energy is 0.043/kWh, how long could...Ch. 17 - How many amperes will a 10-W lamp draw on a 110-V...Ch. 17 - A hydrogen atom contains one electron and one...Ch. 17 - A rod with charge -4.31 10-8 C is held 10 3 cm...Ch. 17 - Hairdryers work by blowing heat that is generated...Ch. 17 - A 1000-W microwave, a 40.0-W fluorescent light...Ch. 17 - A 700-W toaster is plugged into a 110-V outlet....
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