![Fundamentals of Physics, Volume 1, Chapter 1-20](https://www.bartleby.com/isbn_cover_images/9781118233764/9781118233764_largeCoverImage.gif)
Concept explainers
Both batteries in Fig. 27-43a are ideal. Emf ℰ1 of battery 1 has a fixed value, but emf ℰ2 of battery 2 can be varied between 1.0 V and 10 V. The plots in Fig. 27-43b give the currents through the two batteries as a function of ℰ2. The vertical scale is set by is = 0.20 A. You must decide which plot corresponds to which battery, but for both plots, a negative current occurs when the direction of the current through the battery is opposite the direction of that battery’s emf. What are (a) emf ℰ1 (b) resistance R1, and (c) resistance R2?
Figure 27-43 Problem 32.
![Check Mark](/static/check-mark.png)
Trending nowThis is a popular solution!
![Blurred answer](/static/blurred-answer.jpg)
Chapter 27 Solutions
Fundamentals of Physics, Volume 1, Chapter 1-20
Additional Science Textbook Solutions
University Physics Volume 2
Introduction to Electrodynamics
Physics for Scientists and Engineers, Technology Update (No access codes included)
College Physics: A Strategic Approach (4th Edition)
Essential University Physics: Volume 2 (3rd Edition)
Conceptual Physics: The High School Physics Program
- Calculate the drift velocity (in ×10-6 m/s) of electrons in a silver cylindrical conductor with a diameter of 2.0 cm carrying 5.0 A current, given there is one free electron per silver atom. ρsilver = 10490 kg/m3 atomic mass of silver = 107.9 g/mol Avogadro's number = 6.02×1023 atoms/molarrow_forwardA rod of semiconducting material of length L 2 m and cross-sectional area A- 4.5 mm? lies along the x-axis between z0 and a- L The material obeys Ohm's law, and its resistivity varies along the rod according to p= p(1 where po4x 10 n m. The end of the rod at z=0 is at a potential V- 15 V greater than the end at z-L L2 A) What is the total resistance, in units of fn, of the rod?arrow_forwardA length of metal wire has a radius of 5.00 x 10-3 m and aresistance of 0.100 Ω. When the potential difference acrossthe wire is 15.0 V, the electron drift speed is found to be 3.17 x10-4 m/s. On the basis of these data, calculate the density offree electrons in the wirearrow_forward
- A tungsten wire has a radius of 0.097 mm and is heated from 20.0 to 1383 oC. The temperature coefficient of resistivity is α = 4.5 x 10-3 (Co)-1. When 120 V is applied across the ends of the hot wire, a current of 1.8 A is produced. How long is the wire? Neglect any effects due to thermal expansion of the wire.arrow_forwardA current is established in a gas discharge tube when a sufficiently high potential difference is applied across the two electrodes in the tube.The gas ionizes; electrons move toward the positive terminal and singly charged positive ions toward the negative terminal. (a) What is the current in a hydrogen discharge tube in which 3.1 *10^18 electrons and 1.1* 10^18 protons move past a crosssectional area of the tube each second? (b) Is the direction of the current density toward or away from the negative terminal?arrow_forwardA rod of semiconducting material of Length L=5 m and cross-sectional area A=3 mm2 lies along the x-axis between x=0 and x=L. The material obeys ohm’s Law, and its resistivity varies along the rod according to ρ = ρ0*( 1 - x2/L2) where ρ0=4.5 x 10-4 Ω.m. The end of the rod at x=0 is at potential V0=25 V greater than the end at x=L. What is the total resistance, in units of Ω, of the rod? What is the current, in units of miliamperes, in the rod? What is the electric potential, in units of volt, in the rod at x=L/2?arrow_forward
- A rod of semiconducting material of Length L=5 m and cross-sectional area A=3 mm2 lies along the x-axis between x=0 and x=L. The material obeys ohm’s Law, and its resistivity varies along the rod according to ρ = ρ0*( 1 - x2/L2) where ρ0=4.5 x 10-4 Ω.m. The end of the rod at x=0 is at potential V0=25 V greater than the end at x=L. What is the total resistance, in units of Ω, of the rod? What is the current, in units of miliamperes, in the rod? What is the electric potential, in units of volt, in the rod at x=L/2? What is the electric-field magnitude E, in units of V/m, in the rod at x=L/2?arrow_forwardWhat current flows through a 2.45-cm-diameter rod of pure silicon that is 21.5 cm long, when 1.00 x 10³ V is applied to it? (Such a rod may be used to make nuclear particle detectors, for example.) 0.0365 X A What current flows through a 2.45-cm-diameter rod of pure silicon that is 21.5 cm long, when 1.00 x 10³ V is applied to it? (Such a rod may be used to make nuclear particle detectors, for example.) 0.000877 A What current flows through a 2.45-cm-diameter rod of pure silicon that is 21.5 cm long, when 1.00 x 10³ V is applied to it? (Such a rod may be used to make nuclear particle detectors, for example.) 0.00343 X Aarrow_forwardWhat current flows through a 2.45-cm-diameter rod of pure silicon that is 21.5 cm long, when 1.00 x 10³ V is applied to it? (Such a rod may be used to make nuclear particle detectors, for example.) 0.0365 X A What current flows through a 2.45-cm-diameter rod of pure silicon that is 21.5 cm long, when 1.00 x 10³ V is applied to it? (Such a rod may be used to make nuclear particle detectors, for example.) 0.000877 A What current flows through a 2.45-cm-diameter rod of pure silicon that is 21.5 cm long, when 1.00 x 10³ V is applied to it? (Such a rod may be used to make nuclear particle detectors, for example.) 0.00343 X A What current flows through a 2.45-cm-diameter rod of pure silicon that is 21.5 cm long, when 1.00 x 10³ V is applied to it? (Such a rod may be used to make nuclear particle detectors, for example.) 0.0034 X Aarrow_forward
- Consider a copper wire with a diameter of 2.45 mm. (a) What is the drift speed of the electrons in the copper wire when current of 16.0 A flows through it? Assume that each copper atom contributes one free electron to the metal. The density of copper is 8.92 g/cm3. m/s (b) How does this drift speed compare to the random rms speed of an electron at 20.0°C? To make this comparison, determine the random rms speed of an electron at 20.0°C using the ideal gas model and find the ratio of the two speeds. Vrms=arrow_forwardAn independent and constant current source is supplying 0.6 ampere to a uniform copper conductor with length 40 mm, inner radius 7 mm, and outer diameter 20 mm. If the resistivity and the electron concentration of the conductor are 2.4 x 10-8 ohm-meter and 6.4 x 1024 electrons per cubic meter, respectively: a. The drift velocity in the conductor; b. The voltage across the conductor;arrow_forward20 Q : 15 Q 30 C 4. If O = 24 V, at what rate is thermal energy generated in the 20-0 resistor?arrow_forward
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON
![Text book image](https://www.bartleby.com/isbn_cover_images/9781305952300/9781305952300_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9780133969290/9780133969290_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781107189638/9781107189638_smallCoverImage.jpg)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781337553278/9781337553278_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9780321820464/9780321820464_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9780134609034/9780134609034_smallCoverImage.gif)