COLL PHYSICS UPDATE V2&S/WRKBK&MOD MST/
3rd Edition
ISBN: 9780134677149
Author: Knight
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 22, Problem 59GP
The two segments of the wire in Figure P22.59 have equal diameters and equal lengths but different resistivities ρ1 and ρ2. Current I passes through this wire. If the resistivities have the ratio ρ2/ρ1 = 2, what is the ratio ∆V1/∆V2 of the potential differences across the two segments of the wire?
Figure P22.59
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
A copper wire has a square cross section 6.2mm on a side. The wire is 8.0m long and carries a current of 5.2A. The density of free electrons is 8.0x10^28 #/m^3. The resistivity of the copper is: 1.72x10^-8 ohms.m
a) What is the current density in the wire?
b) What is the electric field in the wire?
c) How much time is required for an electron to travel the length of the wire(4m)?
Figure P26.6 represents a section of a conductor of nonuniform diameter carrying a current of I=5.00 A. The radius of cross-section A1 is r1= 0.400 cm. (a) What is the magnitude of the current density across A1? The radius r2 at A2 is larger than the radius r1 at A1.(b) Is the current at A2 larger, smaller, or the same ? (c) Is the current density at A2 larger, smaller, or the same ? Assume A2 = 4A1. Specify the (d) radius, (e) current, and (f) current density at A2.
A copper wire has a square cross section 2.3 mm on a side. The wire is 4.0 m long and carries a current of 3.6 A. The density of free electrons is 8.5 x1028/m3 Find the magnitudes of (a) the current density in the wire (b) the electric field in the wire (c) How much time is required for an electron to travel the length of the wire?
For copper: p = 1.72 x10-82. m n = 8.5 x1028/m3
Chapter 22 Solutions
COLL PHYSICS UPDATE V2&S/WRKBK&MOD MST/
Ch. 22 - What causes electrons to move through a wire as a...Ch. 22 - All wires in Figure Q22.519 are made of the same...Ch. 22 - A wire carries a 4 A current. What is the current...Ch. 22 - Prob. 7CQCh. 22 - Cells in the nervous system have a potential...Ch. 22 - a. Which directionclockwise or...Ch. 22 - Prob. 10CQCh. 22 - The wires in Figure Q22.11 are all made of the...Ch. 22 - The two circuits in Figure Q22.12 use identical...Ch. 22 - The two circuits in Figure Q22.13 use identical...
Ch. 22 - Rank in order, from largest to smallest, the...Ch. 22 - The circuit in Figure Q22.16 has three batteries...Ch. 22 - When lightning strikes the ground, it generates a...Ch. 22 - One way to find out if a wire has corroded is to...Ch. 22 - Over time, atoms boil off the hot filament in an...Ch. 22 - Rank in order, from largest to smallest, the...Ch. 22 - A 100 W lightbulb is brighter than a 60 W...Ch. 22 - Lightbulbs are typically rated by their power...Ch. 22 - Lightbulbs are typically rated by their power...Ch. 22 - A copper wire is stretched so that its length...Ch. 22 - The potential difference across a length of wire...Ch. 22 - A stereo amplifier creates a 5.0 V potential...Ch. 22 - A resistor connected to a 3.0 V battery dissipates...Ch. 22 - If a 1.5 V battery stores 5.0 kJ of energy (a...Ch. 22 - Figure Q22.29 shows a side view of a wire of...Ch. 22 - A person gains weight by adding fatand therefore...Ch. 22 - The current in an electric hair dryer is 10 A. How...Ch. 22 - 2.0 1013 electrons flow through a transistor in...Ch. 22 - Three wires meet at a junction. Wire 1 has a...Ch. 22 - When a nerve cell depolarizes, charge is...Ch. 22 - A wire carries a 15 A current. How many electrons...Ch. 22 - In a typical lightning strike, 2.5 C flows from...Ch. 22 - A capacitor is charged to 6.0 104 C, then...Ch. 22 - In an ionic solution, 5.0 1015 positive ions with...Ch. 22 - The starter motor of a car engine draws a current...Ch. 22 - A car battery is rated at 90 A h, meaning that it...Ch. 22 - What are the values of currents IB and IC in...Ch. 22 - The currents through several segments of a wire...Ch. 22 - How much electric potential energy does 1.0 C of...Ch. 22 - What is the emf of a battery that increases the...Ch. 22 - A 9.0 V battery supplies a 2.5 mA current to a...Ch. 22 - An individual hydrogen-oxygen fuel cell has an...Ch. 22 - An electric catfish can generate a significant...Ch. 22 - A Wire with resistance R is connected to the...Ch. 22 - Wires 1 and 2 are made of the same metal. Wire 2...Ch. 22 - Prob. 20PCh. 22 - Resistivity measurements on the leaves of corn...Ch. 22 - What is the resistance of a. A 1.0-m-long copper...Ch. 22 - A motorcyclist is making an electric vest that,...Ch. 22 - Prob. 24PCh. 22 - A 3.0 V potential difference is applied between...Ch. 22 - Prob. 26PCh. 22 - Prob. 27PCh. 22 - The aluminum wire in a high-voltage transmission...Ch. 22 - Figure P22.29 shows the...Ch. 22 - Figure P22.30 is a...Ch. 22 - In Example 22.6 the length of a 60 W, 240 ...Ch. 22 - The electric field inside a 30-cm-long copper wire...Ch. 22 - A copper wire is 1.0 mm in diameter and carries a...Ch. 22 - Two identical lightbulbs are connected in series...Ch. 22 - A 1.5 V battery moves 2000 C of charge around a...Ch. 22 - a. What is the resistance of a 1500 W (120 V) hair...Ch. 22 - Every second, a battery increases the electric...Ch. 22 - A 70 W electric blanket runs at 18 V. a. What is...Ch. 22 - A 60-cm-long heating wire is connected to a 120 V...Ch. 22 - An electric eel develops a potential difference of...Ch. 22 - The total charge a household battery can supply is...Ch. 22 - A 3.0 V battery powers a flashlight bulb that has...Ch. 22 - A heating element in a toaster dissipates 900 W...Ch. 22 - Older freezers developed a coating of ice inside...Ch. 22 - The hot dog cooker described in the chapter heats...Ch. 22 - Air isnt a perfect electric insulator, but it has...Ch. 22 - The biochemistry that takes place inside cells...Ch. 22 - High-resolution measurements have shown that an...Ch. 22 - When an ion channel opens in a cell wall (see...Ch. 22 - The total charge a battery can supply is rated in...Ch. 22 - A 1.5 V D-cell battery is rated at 15,000 mA h...Ch. 22 - The heating element of a simple heater consists of...Ch. 22 - Variations in the resistivity of blood can give...Ch. 22 - A 40 W (120 V) lightbulb has a tungsten filament...Ch. 22 - Wires arent really ideal. The voltage drop across...Ch. 22 - When the starter motor on a car is engaged, there...Ch. 22 - The electron beam inside a television picture tube...Ch. 22 - The two segments of the wire in Figure P22.59 have...Ch. 22 - A long wire used as a heating element carries a...Ch. 22 - Prob. 61GPCh. 22 - Prob. 62GPCh. 22 - Prob. 63GPCh. 22 - If resistors 1 and 2 are connected to identical...Ch. 22 - An immersion heater used to boil water for a...Ch. 22 - The graph in Figure P22.66 shows the current...Ch. 22 - Its possible to estimate the percentage of fat in...Ch. 22 - If you touch the two terminals of a power supply...Ch. 22 - The average resistivity of the human body (apart...Ch. 22 - MCAT-Style Passage Problems Lightbulb Failure...Ch. 22 - MCAT-Style Passage Problems Lightbulb Failure...Ch. 22 - MCAT-Style Passage Problems Lightbulb Failure...Ch. 22 - MCAT-Style Passage Problems Lightbulb Failure...
Additional Science Textbook Solutions
Find more solutions based on key concepts
You and your roommate are headed to Cancn for spring break. Your roommate, who has had only high school physics...
Essential University Physics (3rd Edition)
Divide 4.23103 m/s by 0.57 ms, and express your answer in m/s2.
Essential University Physics: Volume 1 (3rd Edition)
Whether the acceleration is upward, downward or zero.
Physics (5th Edition)
A projectile with mass m is launched from the ground and follows a trajectory given by
where υx0 and υy0 are t...
Physics for Scientists and Engineers with Modern Physics
8.56 At one instant, the center of mass of a system of two particles is located on the x-axis at x = 2.0 m and ...
University Physics with Modern Physics (14th Edition)
1. Can the magnitude of the displacement vector be more than the distance traveled? Less than the distance trav...
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th 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
- Taking R = 1.00 k and = 250 V in Figure P27.19, determine the direction and magnitude of the current in the horizontal wire between a and e. Figure P27.19arrow_forward(a) The resistance between two well-separated points on the human body is about1.5 x 10. If a potential difference of 120 V is applied across these points, how much current is generated? (b) If the skin is wet, the resistance drops to 5.0 x 10. What will the current be in this case for an applied potential difference of 120 V?arrow_forwardA spool of tungsten wire 200 m long and with a diameter of 0.360 mm is at 20.0°C. For tungsten, the resistivity is 5.60 ✕ 10−8 Ω · m and the temperature coefficient of resistivity is 4.50 ✕ 10−3 (°C)−1. (a) What is the magnitude of the electric field (in V/m) in the wire if it carries a current of 0.450 A? V/m (b) What is the electric power (in W) delivered to the spool while it carries a current of 0.450 A? W (c) What is the power (in W) delivered to the spool if the potential difference across the wire is held constant and the temperature is increased to 310°C? Warrow_forward
- A long wire with a radius of 0.400 cm carries a current. The potential difference across a 3.60 m long section of this wire is 12.0 V, and the wire carries a current of 0.370 A. (a) What is the resistance (in Ω) of the 3.60 m long section of wire? Ω (b) What is the resistivity (in Ω · m) of the wire? Ω · marrow_forwardA spool of iron wire 290 m long and with a diameter of 0.480 mm is at 20.0°C. For iron, the resistivity is 10.0 ✕ 10−8 ��� · m and the temperature coefficient of resistivity is 5.00 ✕ 10−3 (°C)−1. (a) What is the magnitude of the electric field (in V/m) in the wire if it carries a current of 0.450 A? (b) What is the electric power (in W) delivered to the spool while it carries a current of 0.450 A? (c) What is the power (in W) delivered to the spool if the potential difference across the wire is held constant and the temperature is increased to 400°C?arrow_forwardA 580 mm long tungsten wire, with a 0.048 mm diameter circular cross section, is wrapped around in the shape of a coil and used as a filament in an incandescent light bulb. When the light bulb is connected to a battery, a current of 0.536 A is measured through the filament. Tungsten has a resistivity of 4.9 x 10-8 Ohms x m. How many electrons pass through this filament in 5 seconds? What is the resistance of this filament? What is the voltage of the battery that would produce this current in the filament?arrow_forward
- The figure below represents a section of a circular conductor of nonuniform diameter carrying a current of I = 5.70 A. The radius of cross-section A1 is r1 = 0.290 cm. (a) What is the magnitude of the current density across A1? a/m^2, Assume A2 = 2A1., The radius r2 at A2 is larger than the radius r1 at A1. (b) Is the current at A2 larger, smaller, or the same? (c) Is the current density at A2 larger, smaller, or the same? (d) Specify the radius at A2.mm, (e) Specify the current at A2. A, (f) Specify the current density at A2. a/m^2arrow_forwardA 14 gauge copper wire of diameter 1.628 mm carries a current of 10.5 mA. (ρcopper=1.72×10−8Ω⋅m.) a) What is the potential difference across a 2.20 mm length of the wire? Express your answer in volts. b) What would the potential difference in part A be if the wire were silver instead of copper, but all else was the same? ρsilver=1.47×10−8Ω⋅m. Express your answer in volts.arrow_forwarda) The resistance between two well-separated points on the human body is about1.5 x 10. If a potential difference of 120 V is applied across these points, how much current is generated? (b) If the skin is wet, the resistance drops to 5.0 x 10. What will the current be in this case for an applied potential difference of 120 V? blank2 - Numeric Answerarrow_forward
- a. A proton beam in an accelerator carries a current of 110 µA. If the beam is incident on a target, how many protons strike the target in a period of 25.0 s? protons b. An electric heater carries a current of 20.0 A when operating at a voltage of 4.20 102 V. What is the resistance of the heater? Ω c. If a certain silver wire has a resistance of 10.00 Ω at 15.0°C, what resistance will it have at 29.0°C? Ωarrow_forwardA lightning rod on top of a building consists of an iron spike 1.5 m long with a circular crosssection of diameter 1.5 cm. During a lightning strike, the rod carries a current of 1000 A. What is the potential difference across the rod when this current flows? The resistivity of iron is 1.0 x 10-7 Ωm.arrow_forwardAn aluminum wire 1.628 mm in diameter (14-gauge) carries a current of 3.00 amps, (a) What is the absolute value of the charge density in the wire? (b) What is the drift velocity of the electrons? (c) What would be the drift velocity if the same gauge copper were used instead of aluminum? The density of copper is 8.96 g/cm3 and thedensity of aluminum is 2.70 g/cm3. The molar mass ofaluminum is 26.98 g/mol and the molar mass of copper is 63.5 g/mol. Assume each atom of metal contributes one free electron.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Physics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
Physics for Scientists and Engineers with Modern ...
Physics
ISBN:9781337553292
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
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: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
Circuits, Voltage, Resistance, Current - Physics 101 / AP Physics Review with Dianna Cowern; Author: Physics Girl;https://www.youtube.com/watch?v=q8X2gcPVwO0;License: Standard YouTube License, CC-BY