College Physics: A Strategic Approach (4th Edition)
4th Edition
ISBN: 9780134609034
Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 22, Problem 12P
The currents through several segments of a wire object are shown in Figure P22.12. What are the magnitudes and directions of the currents IB and IC in segments Band C?
Figure P22.12
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
A copper wire is dCu = 0.0500 cm in diameter, 3.00 m long, and has a charge carrier density of 8.50x10^28 electrons/m3. The copper wire is attached to an equal length of aluminum wire with diameter dAl = 0.0100 cm and charge carrier density of 6.02x10^28 electrons/m3. A current of 0.400 A flows through the copper wire.
a. The ratio of current densities in the two wires, JCu/JAl is:___.
b. The ratio of drift velocities in the two wires, vd–Cu/vd–Al is:____.
Whale and Kanmuro are two islands located in the Chimera archipelago. These two are
separated by a distance of 24 miles. A power link is to be established between them. The
power link delivers a maximum power of 600 MW at full capacity with an operating voltage
of 500 kV.
a. Solve for the current at full power capacity (Ans: I = 1200 A)
b. Solve for the resistivity of the cable, assuming a conductor diameter of 2.5 cm
|(Ans: p = 5.296x10-6 2 · m)
A 200km long high voltage transmission line runs across the Arizona open desert. The copper wire 2.00 cm in diameter and carries a current of 1200 A. If the free charge carrier density for copper is 8.5*10^28 electrons per cubic meter, how many years does it take one electron to travel the full length of the cable?
Chapter 22 Solutions
College Physics: A Strategic Approach (4th Edition)
Ch. 22 - Prob. 2CQCh. 22 - Prob. 3CQCh. 22 - Prob. 4CQCh. 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 - Prob. 11CQ
Ch. 22 - The two circuits in Figure Q22.12 use identical...Ch. 22 - The two circuits in Figure Q22.13 use identical...Ch. 22 - Prob. 14CQCh. 22 - Rank in order, from largest to smallest, the...Ch. 22 - The circuit in Figure Q22.16 has three batteries...Ch. 22 - Prob. 17CQCh. 22 - Prob. 18CQCh. 22 - Over time, atoms boil off the hot filament in an...Ch. 22 - Prob. 20CQCh. 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 - Prob. 26MCQCh. 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 - Prob. 31MCQCh. 22 - The current in an electric hair dryer is 10 A. How...Ch. 22 - Prob. 2PCh. 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 - Prob. 7PCh. 22 - In an ionic solution, 5.0 1015 positive ions with...Ch. 22 - Prob. 9PCh. 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 - Prob. 16PCh. 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 - Prob. 22PCh. 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 - Prob. 28PCh. 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 - Prob. 35PCh. 22 - a. What is the resistance of a 1500 W (120 V) hair...Ch. 22 - Prob. 37PCh. 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 - Prob. 41PCh. 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 - Prob. 44GPCh. 22 - Prob. 45GPCh. 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 - Prob. 52GPCh. 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 - Prob. 56GPCh. 22 - When the starter motor on a car is engaged, there...Ch. 22 - Prob. 58GPCh. 22 - The two segments of the wire in Figure P22.59 have...Ch. 22 - Prob. 60GPCh. 22 - Prob. 61GPCh. 22 - Prob. 62GPCh. 22 - Prob. 63GPCh. 22 - Prob. 64GPCh. 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
The circuit at tight contains three identical bulbs and an ideal battery. Assume that the resistance of the swi...
Tutorials in Introductory Physics
3. What is free-fall, and why does it make you weightless? Briefly describe why astronauts are weightless in th...
The Cosmic Perspective
Express the unit vectors in terms of (that is, derive Eq. 1.64). Check your answers several ways Also work o...
Introduction to Electrodynamics
46. (II) A 0.50-µF and a 1.4-µF capacitor are connected in series to a 9.0-V battery. Calculate (a) the potent...
Physics: Principles with Applications
In a very mild winter climate, a heat pump has heat transfer from an environment at 5.00C to one at 35.0C. What...
College Physics
7. Explain the difference between science and technology Are the two fields related?
Applied Physics (11th 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 22 gauge aluminum wire is connected in series to a 30 gauge copper wire. Each of the wires is 0.75 m long. A current of 0.300 A flows through the wires. The number density of charges in aluminum is 2.1 × 1029 m-3 and in copper it is 1.1 x 1029 m-3. The charge associated with each charge is equal to the electron's charge (though it is really a hole in Aluminum, and so positive in that case...) The gauges given in the problem refer to the American Wire Gauge Standard. You will need to look up the diameter of each of the specified gauges. Other data that you need for this problem can be found in tables in your text. (a) Find the current density in each wire. (b) Find the drift speed of the electrons in each wire. (c) What is the voltage across each wire? (d) Explain how it is that copper, which has a lower density of conduction electrons than aluminum, can have a higher conductivity than aluminum.arrow_forwardA 50-A current is running through a cylindrical wire that has a cross-sectional area of 4.0 mm2. The drift velocity of the conduction electrons in the wire is 0.85 mm/s. What is the numebr density of the conduction electrons in the wire? a. 9.2 x 1028 electrons/m3 b. 1.4 x 1029 electrons/m3 c. 3.2 x 1030 electrons/m3 d. 4.6 x 1028 electrons/m3 e. 5.7 x 1029 electrons/m3arrow_forwardA conducting rod with a circular cross-section (this rod is a cylinder) has a radius of 1o mm and is 2 metres long. The rod is made of aluminum, so its conductivity is 3.6 x 10' s/m. A potential difference (voltage) is applied at both ends of this rod and the current is I= 90 A. That's a lot of current! a. What is the resistance of the rod, when measured from one end to the other? b. Calculate the current density in the rod along its length. . Determine the electric field amplitude at all locations within the rod. d. What is the electric potential difference between the two ends of the rod.arrow_forward
- A current of 14 A is traveling through a cylindrical metallic wire with a radius of 1.5 mm. The number density of free electron charge carriers in the wire is 8.0 x 1028 electrons/m³. What is the drift velocity of the electrons in the current? O a. 0.35 mm/s b. 0.75 mm/s O c. 0.95 mm/s d. 0.15 mm/s O e. 0.55 mm/sarrow_forwardA copper wire has a diameter of 2.0 mm and a length of 3.0 m. It carries acurrent of 6.3 A. The density of free electrons in copper is 8.5×1028electrons per cubic meter and resistivity of copper is 1.7×10-8Ω.m.a) What is the current density in the wire?b) What is the resistance of the wire?c) What is the electric field in the wire?d) What is the drift velocity of free electrons? Or calculatethe drift velocity of free electrons (or find the drift velocity of freeelectrons)e) Find the power dissipated as heat in the wirearrow_forwardA wire has a current density of 7.09 x 10° A/m?. If the cross-sectional area of the wire is 2.11 mm², what current I does the wire carry? A. With this current, how much time t is required for 4.05 x 100 electrons to pass any point on the wire?arrow_forward
- A 22 gauge aluminum wire is connected in series to a 30 gauge copper wire. Each of the wires is 0.75 m long. A current of 0.300 A flows through the wires. The number density of charges in aluminum is 2.1 × 1029 m−3 and in copper it is 1.1 × 1029 m−3. The charge associated with each charge is equal to the electron’s charge (though it is really a hole in Aluminum, and so positive in that case...) The gauges given in the problem refer to the American Wire Gauge Standard. You will need to look up the diameter of each of the specified gauges (charts of gauge specifications are all over the web and also on our PHY 205 Moodle page.) Other data that you need for this problem can be found in tables in your text. (a) Find the current density in each wire. (b) Find the drift speed of the electrons in each wire. (c) What is the voltage across each wire? (d) Explain how it is that copper, which has a lower density of conduction electrons than aluminum, can have a higher conductivity than aluminum.arrow_forwardA high voltage transmission line of diameter 2 cm and length 2 km carries a steady current of 1000 A. If the conductor is copper with a free charge density of 8 × 1028 electrons/m3, how long does it take one electron to travel the full length of the cable? (e = 1.6 × 10−19 C) Select one: a. 8 × 104 s b. 8 × 106 sarrow_forward8 - The figure in the attachment represents a section a circular conductor of nonuniform diameter carrying a current of 6 A. radius of cross section A1 is 0.5 cm. What is the magnitude of the current density across A,? Ag A1 Figure P27.8 a) O 50,64 kA/m? b) O 56,4 kA/m2 c) O 76,4 kA/m2 d) O 76 A/m² O 56,4 A/m?arrow_forward
- An unknown wire in a circuit has a circular cross-section with diameter 4.8 mm. It carries a current of 2.1 mA. A. What is the current density, in milliamperes per square centimeter, in this wire? B. If you assume the drift velocity in this wire is 1 × 10-2 cm/s, what is the density of charge carries per cubic centimeter? C. If the conductivity in this wire is 3.5 × 106 Ω-1 m-1, what is the average time between collisions, in nanoseconds?arrow_forward3. The electric field of the material between two coaxial cables of radius .25 m and .51 m is given as E = 2.58 V.m/r3. If the conductivity of the material is 5 x 100 S/m, what %3D is the current density in the material?arrow_forwardPlease answer this excercise. This is not a graded question. 1. A silver wire 1.00 mm in diameter transfers a charge of 65.0 C in 1 hr. 15.0 min. Silver contains 5.0 × 1028 eoectrons per cubic meter. What is the current in the wire? What is the magnitude of the drift velocity of the electrons in the wire? 2. An aluminum wire carrying a current has a diameter of 0.600 mm. The electric field in the wire is 0.640 V/m. What is tue current carried by the wire? What is the potential difference between two points if the wires are 12.0m apart? What is the resistance of a 12.0m length of wire?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 LearningPhysics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher: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 with Modern ...
Physics
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
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