College Physics
2nd Edition
ISBN: 9780134601823
Author: ETKINA, Eugenia, Planinšič, G. (gorazd), Van Heuvelen, Alan
Publisher: Pearson,
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 19, Problem 59P
* Ratio reasoning Determine the ratio of the resistances of two wires that are identical except that (a) wire A is twice as long as wire B, (b) wire A has twice the radius of wire B, and (c) wire A is made of copper and wire B is made of aluminum. Be sure to show clearly how you arrive at each answer.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
For the circuit below. Hint, current in inversely proportional to resistance. Ix/IT=RT/Rx, see "Current Divider Rule" in your notes. For this problem. Determine the equivalent resistance in each set of branches, for the I1 branch it would be 1/RE=1/8 +1/8. Split the total (6A) current between I1 and I2 using the current divider rule. Then apply the current divider rule one more time to split I1 between I3 and the other 8 Ω resistor.
Determine I1.
Determine I2.
Determine I3.
Determine I4.
The electric current I in a circuit shown in the figure was measured as a function of the
resistance R in the circuit. The relationship between I and R is given by
R+r
where e is the emf of the battery in the circuit and r is the internal resistance of the battery.
ɛ,r
a) Linearise the equation above, and state which variable you would plot on the x-axis and
which on the y-axis.
b) How are ɛ and r related to the gradient and/or y-intercept of the graph?
Question 9
When the resistor R in (Figure 1) is 38 N , the high-
resistance voltmeter reads 9.9 V . When R is replaced
by a 8.1-2 resistor, the voltmeter reading drops to
8.0 V.
Part A
What is the emf of the battery?
Express your answer to two significant figures and include the appropriate units.
E =
Value
Units
Submit
Request Answer
Figure
1 of 1
▼
Part B
What is the internal resistance of the battery?
V
Express your answer to two significant figures and include the appropriate units.
HẢ
?
R
Value
Units
r =
Submit
Request Answer
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...
Additional Science Textbook Solutions
Find more solutions based on key concepts
If acceleration is proportional to the net force or is equal to net force.
Conceptual Physics (12th Edition)
5.68 CP CALC A 2.00-kg box is suspended from the end of a light vertical rope. A time-dependent force is applie...
University Physics (14th Edition)
3. What is free-fall, and why does it make you weightless? Briefly describe why astronauts are weightless in th...
The Cosmic Perspective (8th Edition)
Rooms A and B are the same size, and are connected by an open door. Room A, however, is warmer (perhaps because...
An Introduction to Thermal Physics
(a) What is the capacitance of a parallel plate capacitor having plates of area 1.50 m2 that are separated by 0...
College Physics
72. On an essentially frictionless horizontal ice-skating rink, a skater moving at 3.0 m/s encounters a rough p...
College Physics (10th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Consider the circuits shown below, (a) What is the current through each resistor in part (a)? (b) What is the current through each resistor in part (b)? (c) What is the power dissipated or consumed by each circuit? (d) What is the power supplied to each circuit?arrow_forwardIn a Row Math Worksheet Draw a circuit diagram for a circuit that has one battery and two light bulbs connected in series. For the above circuit, one bulb has a resistance of 2 Q and a second bulb has a resistance of 3 Q. The total resistance for two bulbs in series is equal to the sum of their resistances. Use this equation to find the total resistance of the circuit: Rtotal = R1 + R2 For a circuit that has one battery and two light bulbs connected in series, one bulb has aarrow_forwardShown below are six VOLTAGE vs. CURRENT graphs. Identify all the graphs that are consistent with an ohmic resistor (R = 0). VOLTAGE vs. CURRENT GRAPHS KI ✓ MY NOTES ASK YOURarrow_forward
- Last summer, a Meralco electrician conducts a record of the electrical voltage supply readings within 5 hours at Cavite City. (See the table below) 1. Represent a graph showing the voltage readings as y-values and the time as x-values. 2. Is the graph continuous or not?arrow_forwardThree resistors are connected in parallel as shown in the figure. The potential difference between a and b is 75 V. a)What is the equivalent resistance of this circuit? b)What is the current flowing from point a? c) What is the current in each resistor?arrow_forwardWhat is the total resistance (sum) of the two wires? Express your answer to two significant figures and include the appropriate units. rtotal= What is the current through the wire? Express your answer to two significant figures and include the appropriate units. I=arrow_forward
- Two students plan an experiment that connects a bulb to an adjustable voltage source along with a voltmeter and an ammeter to measure the voltage and current. Then they repeated the experiment with a light bulb that has a different resistance. They recorded their data and graphed it on the axes shown. Bulb 1. Bulb Current Graph from: htlpwwww.lkarn.arg.au/ueenee course paresfueenecef04a-de-cireuitr/tccincuits week 2res-valt.currentcanh b/ According to the results of their investigation, which light bulb had a greater electrical resistance? OLight bulb #1 because it reaches a higher voltage, causing more current. () Light bulb #2 because it has a higher current, which indicates greater resistance. OLight bulb #1 because the greater slope of the line indicates greater.resistance. Light #2 because the smalier slope of the line Indicates greater resistance.arrow_forwardA circuit is constructed as shown in the diagram to the right. R1 = 64 Ω, R2 = 29 Ω, R3 = 14 Ω, and R4 = 61 Ω. a) Write an equation for the equivalent resistance of the resistors in circle A in terms of the individual resistances. b) Write an equation for the equivalent resistance of the circuit in terms of R1, R4, and the equivalent resistance of circle A, RA. c) Calculate for the equivalent resistance of the circuit in ohms.arrow_forwardReal materials only have so many electrons (with fixed charge) that are free to move through a circuit. How can the same object allow different amounts of current to flow through it? Use what you noticed about the electrons in the simulation to justify your answer. image of simulation belowarrow_forward
- Activity 1- Problem Solving Solve the following problems involving the relationship of current, charges, and time from this equation I=Q/t. Show your complete solution. The compressor on an air conditioner draws 40.0A when it starts up. If the start-up time is 0.50s, calculate the number of charges passing through a cross-sectional area of the circuit in this time?arrow_forwardThe electric circuit shown at the right consists of a battery and three identical light bulbs. Which of the following statements are true concerning this circuit? List all that apply. a. The current through point X will be greater than that through point Z. b. The current through point Z will be greater than that through point Y. c. The current will be the same through points X, Y and Z. d. The current through point X will be greater than that through point Y. e. The current through point Y will be greater than that through point X.arrow_forwardSee the attached picture of an electrical circuit. Find the voltage drops across each resistor. Find the currents through each resistor. When solving, show your directions for each current and the direction of the voltage drops across each resistor. Thank youarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningGlencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
Glencoe Physics: Principles and Problems, Student...
Physics
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Glencoe/McGraw-Hill
Series & Parallel - Potential Divider Circuits - GCSE & A-level Physics; Author: Science Shorts;https://www.youtube.com/watch?v=vf8HVTVvsdw;License: Standard YouTube License, CC-BY