College Physics
2nd Edition
ISBN: 9780134601823
Author: ETKINA, Eugenia, Planinšič, G. (gorazd), Van Heuvelen, Alan
Publisher: Pearson,
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 19, Problem 58P
* A wire whose resistance is R is stretched so that its length is tripled while its volume remains unchanged. Determine the resistance of the stretched wire.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Two wires are made of the same material. The first wire has a resistance of 0.2 Ω. The second wire is twice as long as the first wire and has a radius that is half of the first wire. Determine the resistance of the second wire
The average resistivity of the human body (apart from sur face resistance of the skin) is about 5.0 Ω • m. The conducting path between the right and left hands can be approximated as a cylinder 1.6 m long and 0.10 m in diameter. The skin resistance can be made negligible by soaking the hands in salt water.a. What is the resistance between the hands if the skin resistance is negligible?b. If skin resistance is negligible, what potential difference between the hands is needed for a lethal shock current of 100 mA? Your result shows that even small potential differences can produce dangerous currents when skin is damp.
A cube of a material of side 1 cm has a
resistance of 0.001 Q between its
opposite faces. If the same volume of
the material has a length of 8 cm and
a uniform cross-sectional area, what
will be the resistance of this length?
Use three decimal places. *
Your answer
Calculate the resistance of 100-m
wire having a cross-sectional area of
0.1mm^2 and made of manganin which
has a resistivity of 50x10°-8 Q.m.
Answer in whole number form.
Your answer
A single-core underground cable has a
соpper
conductor of diameter 1.2cm
and resistivity of 5.8x10^12 Q.m. If
the thickness of the insulating
material is 1.2 cm, calculate the
insulation resistance of a 5-km
length of this cable in Megaohms. *
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
An ideal gas is made to undergo the cyclic process shown in Figure 1.10 (a). For each of the steps A, B, and C,...
An Introduction to Thermal Physics
4. Accuracy is
the same as precision.
the smallest unit with which a measurement is made.
the number of signifi...
Applied Physics (11th Edition)
The pV-diagram of the Carnot cycle.
Sears And Zemansky's University Physics With Modern Physics
Answer Problems 3 through 5 by choosing one of the eight labeled acceleration vectors or selecting option I: = ...
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
72. ǁ A rocket blasts off vertically from rest on the launch pad with a constant upward acceleration of 2.50m/s...
College Physics (10th Edition)
15. One bowling ball sits at rest, and another bowling ball rolls down a lane at constant speed. Which ball is ...
Conceptual Physical Science (6th 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
- (a) A defibrillator sends a 6.00-A current through the chest of a patient by applying a 10,000-V potential as in the figure below. What is the resistance of the path? (b) The defibrillator paddles make contact with the patient through a conducting gel that greatly reduces the path resistance. Discuss the difficulties that would ensue if a larger voltage were used to produce the same current through the patient, but with the path having perhaps 50 times the resistance. (Hint: The current must be about the same, so a higher voltage would imply greater power. Use this equation for power: P=I2 RP = .)arrow_forward(a) Can the circuit shown in Figure P18.29 be reduced to a single resistor connected to the batteries? Explain. (b) Find the magnitude of the current and its direction in each resistor. Figure P18.29arrow_forward(a) Can the circuit shown in Figure P27.21 be reduced to a single resistor connected to a battery? Explain. Calculate the currents (b) I1, (c) I2, and (d) I3. Figure P27.21arrow_forward
- (a) Digital medical thermometers determine temperature by measuring the resistance of a semiconductor device called a thermistor (which has a= - 0.0600/°C ) when it is at the same temperature as the patient. What is a patient's temperature if the thermistor’s resistance at that temperature is 82.0% of its value at 37.0°C (normal body temperature)? (b) The negative value for a may not be maintained for very low temperatures. Discuss why and whether this is the case here. (Hint: Resistance can’t become negative.)arrow_forwardCalculate the equivalent resistance between points P and Q of the electrical network shown in Figure P29.80.arrow_forwardThe resistance between terminals a and b in Figure P27.36 is 75.0 . If the resistors labeled R have the same value, determine R. Figure P27.36arrow_forward
- Two 1.50-V batterieswith their positive terminals in the same directionare inserted in series into a flashlight. One battery has an internal resistance of 0.255 , and the other has an internal resistance of 0.153 . When the switch is closed, the bulb carries a current of 600 mA. (a) What is the bulbs resistance? (b) What fraction of the chemical energy transformed appears as internal energy in the batteries?arrow_forwardWire B has twice the length and twice the radius of wire A. Both wires are made from the same material. If wire A has a resistance R, what is the resistance of wire B? (a) 4R (b) 2R (c) R (d) 12R (e) 14Rarrow_forwardFor the purpose of measuring the electric resistance of shoes through the body of the wearer standing on a metal ground plate, the American National Standards Institute (ANSI) specifies the circuit shown in Figure P27.14. The potential difference V across the 1.00-M resistor is measured with an ideal voltmeter. (a) Show that the resistance of the footwear is Rshoes=50.0VVV (b) In a medical test, a current through the human body should not exceed 150 A. Can the current delivered by the ANSI-specified circuit exceed 150 A? To decide, consider a person standing barefoot on the ground plate. Figure P27.14arrow_forward
- In the circuit of Figure P27.20, the current I1 = 3.00 A and the values of for the ideal battery and R are unknown. What are the currents (a) I2 and (b) I3? (c) Can you find the values of and R? If so, find their values. If not, explain. Figure P27.20arrow_forwardDuring the manufacture of wire, the cross section can be decreased, and the length increased, by pulling the wire through a hole (in what is called a die) that is smaller than the wire’s initial cross-section. a. If the wire is stretched to 4 times its original length, by what factor does its resistance increase? fR = b. If the wire is stretched to 6 times its original length, by what factor does its resistance increase? fR =arrow_forwardA cylindrical resistor is 9.3 cm long and has a resistance of 48 N measured end-to-end. The material is melted down and recast* into a new thicker cylindrical resistor that is 4.0 cm long. What is the resistance of the new resistor? Give your answer in units of N. *Assume in the recasting process, the material is perfectly preserved such that the new resistor has the same resistivity and volume as before.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers with Modern ...
Physics
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
How To Solve Any Resistors In Series and Parallel Combination Circuit Problems in Physics; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=eFlJy0cPbsY;License: Standard YouTube License, CC-BY