Essential University Physics: Volume 2 (3rd Edition)
3rd Edition
ISBN: 9780321976420
Author: Richard Wolfson
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 24, Problem 54P
At a particular point in a material with resistivity ρ the current density has magnitude J. Show that the power per unit volume dissipated at this point is J2ρ.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
At a particular point in a material with resistivity r the current density has magnitude J. Show that the power per unit volume dissipated at this point is (J^2)r.
A 20.70 V battery is used to supply current to a 25 k resistor. Assume the voltage drop across any wires used for connections is negligible.
(a) What is the current (in mA) through the resistor?
8.28e-7
X mA
(b) What is the power dissipated by the resistor (in mW)?
0.0
X mW
(c) What is the power input from the battery (in mW), assuming all the electrical power is dissipated by the resistor?
mW
(d) What happens to the energy dissipated by the resistor?
The energy dissipated by the resistor is converted to elastic potential energy.
The energy dissipated by the resistor is converted to electric potential energy.
The energy dissipated by the resistor is converted to heat.
The energy dissipated by the resistor is converted to gravitational potential energy.
A 2.00-nF capacitor with an initial charge of 4.60 µC is discharged through a 2.69-kΩ resistor.
(a) Calculate the current in the resistor 9.00 µs after the resistor is connected across the terminals of the capacitor. (Let the positive direction of the current be define such that dQ/dt>0.)
I get 160.5ma which is wrong.
Chapter 24 Solutions
Essential University Physics: Volume 2 (3rd Edition)
Ch. 24.1 - Prob. 24.1GICh. 24.2 - Two wires carry the same current I. Wire A has a...Ch. 24.3 - Prob. 24.3GICh. 24.4 - You put a variable resistance across a battery...Ch. 24.5 - Todays power tools are often cordless, powered by...Ch. 24 - Explain the difference between current and current...Ch. 24 - A constant electric field generally produces a...Ch. 24 - When caught in the open in a lightning storm, a...Ch. 24 - Good conductors of electricity are often good...Ch. 24 - Why can current persist forever in a...
Ch. 24 - Does an electric stove burner draw more current...Ch. 24 - A person and a cow are standing in a field when...Ch. 24 - You put a 1.5-V battery across a piece of...Ch. 24 - Prob. 9FTDCh. 24 - A 50-W and a 100-W lightbulb are both designed to...Ch. 24 - Equation 24.8a suggests that no power can be...Ch. 24 - Whats wrong with this news report: A power-line...Ch. 24 - A wire carries 1.5 A. How many electrons pass...Ch. 24 - A 12-V car battery is rated at 80 ampere-hours,...Ch. 24 - Biologists measure the total current due to...Ch. 24 - The National Electrical Code specifies a maximum...Ch. 24 - The electric field in an aluminum wire is 85 mV/m....Ch. 24 - What electric field is necessary to drive a 7.5-A...Ch. 24 - Prob. 19ECh. 24 - A 1.0-cm-diameter rod carries a 50-A current when...Ch. 24 - Use Table 24.1 to determine the conductivity of...Ch. 24 - Find the resistance of a heating coil that draws...Ch. 24 - Prob. 23ECh. 24 - Whats the current in a 47-k resistor with 110 V...Ch. 24 - The third rail that carries electric power to a...Ch. 24 - What current flows when a 45-V potential...Ch. 24 - A uniform wire of resistance R is stretched until...Ch. 24 - A cars starter motor draws 125 A with 11 V across...Ch. 24 - A 4.5-W flashlight bulb draws 750 mA. (a) At what...Ch. 24 - A watch uses energy at the rate of 240 W. What...Ch. 24 - A 35- electric stove burner consumes 1.5 kW of...Ch. 24 - An incandescent lightbulb draws 0.50 A, while a...Ch. 24 - Though rare, electrocution has been reported under...Ch. 24 - You touch a defective appliance while standing on...Ch. 24 - You have a typical resistance of 100 k. (a) How...Ch. 24 - An ion channel in a cell membrane carries 2.4 pA...Ch. 24 - A lightbulb filament has diameter 0.050 mm and...Ch. 24 - A gold film in an integrated circuit measures 1.85...Ch. 24 - A copper wire joins an aluminum wire whose...Ch. 24 - Prob. 40PCh. 24 - In a study of proteins mediating cell membrane...Ch. 24 - Theres a 2.5-V potential difference between...Ch. 24 - The maximum safe current in 12-gauge...Ch. 24 - Silver and iron wires of the same length and...Ch. 24 - You have a cylindrical piece of material 2.4 cm...Ch. 24 - How must the diameters of copper and aluminum wire...Ch. 24 - Youre writing the instruction manual for a power...Ch. 24 - An implanted pacemaker supplies the heart with 72...Ch. 24 - A solid rectangular iron bar measures 0.50 cm by...Ch. 24 - Each pulse produced by the Taser described in the...Ch. 24 - The Nissan Leaf is an all-electric car powered by...Ch. 24 - An electric heater is tested by immersing it in...Ch. 24 - Magnetic effects involving Jupiters moon Io result...Ch. 24 - At a particular point in a material with...Ch. 24 - A thermally insulated container of seawater...Ch. 24 - Youre heading out for spring break, but your car...Ch. 24 - Two cylindrical resistors are made from the same...Ch. 24 - Youre working on a new high-speed rail system. It...Ch. 24 - A 100%-efficicnt electric motor is lifting a 15-N...Ch. 24 - A power plant produces 1000 MW to supply a city 40...Ch. 24 - Youre estimating costs for a new power line with...Ch. 24 - A 240-V electric motor is 90% efficient, meaning...Ch. 24 - A metal bar has rectangular cross section 5.0 cm...Ch. 24 - An immersion-type heating coil is connected to a...Ch. 24 - The resistivity of copper as a function of...Ch. 24 - Each atom in aluminum contributes about 3.5...Ch. 24 - Prob. 67PCh. 24 - Figure 24.20 shows a truncated cone of material...Ch. 24 - The current density in a particle beam with...Ch. 24 - Prob. 70PCh. 24 - You work for an automobile manufacturer developing...Ch. 24 - During the brownout, the current in conductors...Ch. 24 - Which of the following occurs in the conductors of...Ch. 24 - During the brownout, the power dissipated in...Ch. 24 - Prob. 75PP
Additional Science Textbook Solutions
Find more solutions based on key concepts
Particles of light have no mass. Does the Sun’s mass change as a result of all the light it emits? Explain.
Modern Physics
Is it possible to have zero velocity and still be accelerating?
Essential University Physics (3rd Edition)
The pV-diagram of the Carnot cycle.
Sears And Zemansky's University Physics With Modern Physics
Rankingof the torques from smallest to largest.
College Physics: A Strategic Approach (3rd Edition)
In humans, having dimples is a dominant trait allele D, and having no simples is a recessive trait allele d. Yo...
Conceptual Integrated Science
Using the information listed above, does Earth stay the same distance from the Sun throughout the year? If not,...
Lecture- Tutorials for Introductory Astronomy
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 20.00-V battery is used to supply current to a 10-k resistor. Assume the voltage drop across any wires used for connections is negligible, (a) What is the current through the resistor? (b) What is the power dissipated by the resistor? (c) What is the power input from the battery; assuming all the electrical power is dissipated by the resistor? (d) What happens to the energy dissipated by the resistor?arrow_forwardA 2.00-nF capacitor with an initial charge of 5.69 μC is discharged through a 1.07-k resistor. (a) Calculate the current in the resistor 9.00 µs after the resistor is connected across the terminals of the capacitor. (Let the positive direction of the current be define such that. mA (b) What charge remains on the capacitor after 8.00 µs? μC (c) What is the (magnitude of the) maximum current in the resistor? > 0.)arrow_forwardA 2.00-nF capacitor with an initial charge of 5.30 μC is discharged through a 1.19-k resistor. (a) Calculate the magnitude of the current in the resistor 9.00 us after the resistor is connected across the terminals of the capacitor. 2.23e+6 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. mA (b) What charge remains on the capacitor after 8.00 µs? μ℃ (c) What is the maximum current in the resistor? Aarrow_forward
- A 2.00-nF capacitor with an initial charge of 4.86 µC is discharged through a 1.17-k resistor. (a) Calculate the magnitude of the current in the resistor 9.00 μs after the resistor is connected across the terminals of the capacitor. 43.4 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. mA (b) What charge remains on the capacitor after 8.00 μs? 0.160 μC (c) What is the maximum current in the resistor? 2.07 Aarrow_forwardA 2.00-nF capacitor with an initial charge of 4.93 µC is discharged through a 1.93-k resistor. dQ (a) Calculate the current in the resistor 9.00 µs after the resistor is connected across the terminals of the capacitor. (Let the positive direction of the current be define such that dt 1.72 The current through the resistor is considered to be negative, so that I = dQ/dt. mA (b) What charge remains on the capacitor after 8.00 µs? μC (c) What is the (magnitude of the) maximum current in the resistor? A > 0.)arrow_forwardplease solve asap and in detailarrow_forward
- Two 3.8microF capacitors, two 2.2kohms resistors and a 16.0V source are connected in series. Starting from the uncharged state, how long does it take for the current to drop from its initial value to 1.50 mAarrow_forwardA 2.00-nF capacitor with an initial charge of 5.30 μC is discharged through a 1.19-kn resistor. (a) Calculate the magnitude of the current in the resistor 9.00 us after the resistor is connected across the terminals of the capacitor. 50.74 mA (b) What charge remains on the capacitor after 8.00 µs? 1.8e-7 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. μC (c) What is the maximum current in the resistor? 2.2269 A Need Help? Read It Watch Itarrow_forwardA 2.00-nF capacitor with an initial charge of 4.60 µC is discharged through a 2.69-kΩ resistor. (a) Calculate the current in the resistor 9.00 µs after the resistor is connected across the terminals of the capacitor. (b) What charge remains on the capacitor after 8.00 µs? (c) What is the (magnitude of the) maximum current in the resistor?arrow_forward
- A resistor gains 3 Joules of heat in 30 seconds when a current is sent through it. What is the average power dissipated in the resistor during this time?arrow_forwardA copper wire of resistance R = 24 Q is connected to a source of voltage that increases with time as AV(t) = Vo(1 - e-at), where Vo = 130 V and a = 0.62 s1. P=Vo²/R (1-e¯at)2 Calculate the energy dissipated by the resistor in joules during the first t = 1.75 s.arrow_forwardA 2.00-nF capacitor with an initial charge of 5.14 μC is discharged through a 1.32-k resistor. (a) Calculate the magnitude of the current in the resistor 9.00 us after the resistor is connected across the terminals of the capacitor. mA (b) What charge remains on the capacitor after 8.00 µs? μc (c) What is the maximum current in the resistor? Aarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Ohm's law Explained; Author: ALL ABOUT ELECTRONICS;https://www.youtube.com/watch?v=PV8CMZZKrB4;License: Standard YouTube License, CC-BY