Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN: 9781133939146
Author: Katz, Debora M.
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 28, Problem 77PQ
To determine
The expression for the drift velocity of electrons flowing in the wire as a function of
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
Consider a copper wire with a diameter of 2.75 mm.
A. What is the drift speed of the electrons in the copper wire when a current of 13.0 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.
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.
The capacitance of a parallel-plate capacitor is proportional to the area of its plates and inversely proportional to the plate separation.
O True
O False
The drift speed of electrons in a copper wire carrying 10 A current is much greater than 1 m/sec.
O True
O False
The electric power dissipated in a resistor is eventually converted to kinetic energy of charges.
O True
O False
A
x=0
A
AV
A potential difference of AV = 30 (V) is applied to the
ends of a straight wire with cross section A length of
L = 2 (m). The resistivity of the wire varies with
p(x) = (1+x) (nm). Here x is the distance measured
from one end of the wire in meters.
B
What is the magnitude of the electric field at the midpoint
(x = L/2) of the wire, in (V/m)?
n
D
10
9.0
30
p(x)
15
x=L
20
X
Chapter 28 Solutions
Physics for Scientists and Engineers: Foundations and Connections
Ch. 28.1 - Prob. 28.1CECh. 28.2 - Prob. 28.2CECh. 28.3 - Prob. 28.3CECh. 28.5 - When a lightbulb burns out, its filament breaks so...Ch. 28.6 - A battery with terminal potential is connected to...Ch. 28.7 - A battery of terminal potential is connected to a...Ch. 28 - Prob. 1PQCh. 28 - Prob. 2PQCh. 28 - Prob. 3PQCh. 28 - Prob. 4PQ
Ch. 28 - Prob. 5PQCh. 28 - Prob. 6PQCh. 28 - Prob. 7PQCh. 28 - Prob. 8PQCh. 28 - Prob. 9PQCh. 28 - Prob. 10PQCh. 28 - Prob. 11PQCh. 28 - Prob. 12PQCh. 28 - Prob. 13PQCh. 28 - Prob. 14PQCh. 28 - The current in a wire varies with time (measured...Ch. 28 - Prob. 16PQCh. 28 - The amount of charge that flows through a copper...Ch. 28 - Prob. 18PQCh. 28 - Prob. 19PQCh. 28 - Prob. 20PQCh. 28 - Prob. 21PQCh. 28 - Prob. 22PQCh. 28 - A copper wire that is 2.00 mm in radius with...Ch. 28 - Prob. 24PQCh. 28 - Prob. 25PQCh. 28 - Prob. 26PQCh. 28 - What is the electric field in an aluminum wire if...Ch. 28 - Prob. 28PQCh. 28 - Prob. 29PQCh. 28 - Prob. 30PQCh. 28 - Prob. 31PQCh. 28 - Prob. 32PQCh. 28 - Two concentric, metal spherical shells of radii a...Ch. 28 - Prob. 34PQCh. 28 - Prob. 35PQCh. 28 - Prob. 36PQCh. 28 - Prob. 37PQCh. 28 - A lightbulb is connected to a variable power...Ch. 28 - Prob. 39PQCh. 28 - Prob. 40PQCh. 28 - Prob. 41PQCh. 28 - Prob. 42PQCh. 28 - Prob. 43PQCh. 28 - A Two wires with different resistivities, 1 and 2,...Ch. 28 - A copper and a gold wire are supposed to have the...Ch. 28 - Gold bricks are formed with the dimensions 7358134...Ch. 28 - Prob. 47PQCh. 28 - Prob. 48PQCh. 28 - Prob. 49PQCh. 28 - Prob. 50PQCh. 28 - Prob. 51PQCh. 28 - Prob. 52PQCh. 28 - Prob. 53PQCh. 28 - Prob. 54PQCh. 28 - A two-slice bread toaster consumes 850.0 W of...Ch. 28 - Prob. 56PQCh. 28 - Prob. 57PQCh. 28 - Prob. 58PQCh. 28 - Prob. 59PQCh. 28 - Prob. 60PQCh. 28 - Prob. 61PQCh. 28 - Prob. 62PQCh. 28 - Prob. 63PQCh. 28 - Prob. 64PQCh. 28 - Prob. 65PQCh. 28 - Prob. 66PQCh. 28 - Prob. 67PQCh. 28 - Prob. 68PQCh. 28 - Prob. 69PQCh. 28 - Prob. 70PQCh. 28 - Prob. 71PQCh. 28 - Prob. 72PQCh. 28 - Prob. 73PQCh. 28 - Prob. 74PQCh. 28 - Review When a metal rod is heated, its resistance...Ch. 28 - Prob. 76PQCh. 28 - Prob. 77PQCh. 28 - Prob. 78PQCh. 28 - Prob. 79PQCh. 28 - Prob. 80PQCh. 28 - Prob. 81PQCh. 28 - A conducting material with resistivity is shaped...
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 high-energy proton accelerator produces a proton beam with a radius of r - 0,90 mm. The beam current is I=9.00A and is constant. The charge density ofthe beam is n = 6.001011 protons per cubic meter, (a)What is the current density of the beam? (b) What is the drift velocity of the beam? (c) How much time does it take for 1.0010 m protons to be emitted by the accelerator?arrow_forwardTwo concentric, metal spherical shells of radii a = 4.0 cm and b = 8.0 cm are separated by aluminum as shown in Figure P28.33. The inner sphere has a total charge Q at any time. If the two spheres are maintained at a potential difference of 2.0 V via an external source, calculate the current from one sphere to the other.arrow_forwardA copper wire that is 2.00 mm in radius with density 8.94 g/cm3 has a current of 8.00 A. The molar mass of copper is 63.5463, and each copper atom contributes one free electron. What is the drift speed of the electrons in the copper wire?arrow_forward
- What is the electric field in an aluminum wire if the drift speed of the free electrons in the wire is measured to be 4.50 105 m/s? The resistivity of aluminum is 2.655108m.arrow_forwardA conducting material with resistivity is shaped into a wire of length ( with a tapered cross section that decreases from radius r1 on the left end to r2 on its right end (Fig. F28.82). If the current density in the wire is a constant as a function of the horizontal distance x along the wire, what is the resistance of this tapered wire?arrow_forwardA conducting rod with a circular cross-section (this rod is a cylinder) has a radius of 10 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. c. d. What is the electric potential difference between the two ends of the rod.arrow_forward
- A 100km long high voltage transmission line that uses an unknown material has a diameter of 3 cm and a potential difference of 220V is maintained across the ends. The average time between collision is 2.7 x 10-14 s and the free-electron density is 8.5 x 1026 /m³. d. Determine the resistivity of the unknown material in micro-ohmmeter. e. Determine the time taken by the electrons to travel the full length of the cable in mega- seconds.arrow_forwardp versus T. The figure shows the behavior of the resistivity p of a material Z as a function of temperature T. If a constant electric field is maintained inside it, which of the following statements is/are TRUE P. about the metal? I. The current density in metal Z increases with increasing tempera- -T To ture. II. Its resistivity at T = T, is Po. III. Metal Z becomes a better conductor with increasing temperature. A. I only В. П only C. I and II D. II and IIIarrow_forwardm An aluminum wire having a cross-sectional area equal to 2.10 x 107 -6 electron per atom. Find the drift speed of the electrons in the wire. mm/s Need Help? Read It carries a current of 7.00 A. The density of aluminum is 2.70 g/cm³. Assume each aluminum atom supplies one conductionarrow_forward
- 1.5 × 1020 electrons flow through a cross section of a 1.8-mm-diameter iron wire in 6.0 s. Part A What is the electron drift speed? Express your answer in micrometers per second. ► View Available Hint(s) vd = xa 5 ΑΣΦ Xh a h √x x x x ? IX X.10n X ****** μm/sarrow_forward2.00 x 100 electrons flow through a cross section of a 4.60-mm-diameter iron wire in 4.00 s. You may want to review (Pages 743-745). Part A What is the electron drift speed? Η ΑΣΦ a um/sarrow_forwardThe amount of charge that flows through a copper wire 1.00 cm in radius as a function of time is given by q=2t3+8t2+2, where q is in coulombs and t is in seconds. a. What is the current through the copper wire at t = 2.00 s? b. What is the current density in the copper wire at t = 2.00 s?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.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