Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN: 9781133939146
Author: Katz, Debora M.
Publisher: Cengage Learning
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Chapter 28.3, Problem 28.3CE
To determine
Whether the current density points in
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A 1.00-mm-radius, cylindrical copper wire carries a current of 8.00 A. If each copper atom in the wire
contributes one free conduction electron to the current, what is the drift velocity of the electrons in the wire?
Some useful information: MCu= 63.546 g/mole, Pcu = 8.96 g/cm3, and NA
= 6.02 x 1023 mole-1.
%3D
a. 0.304 mm/s
b.0.510 mm/s
O c. 0.733 mm/s
d. 0.0923 mm/s
O e. 0.187 mm/s
A conductor has a cross-
sectional area of 2.3\( \times
\)10-6 m2 and the number of
free electrons per unit volume
is 8.5\( \times
\)1028 electron/m³. When the
current is 10 A, find the drift
speed (in mm/s) of the
electrons. Use the charge of
the electron to be 1.6\( \times
\)1019 C.
Select one:
O A. 31.97
O B. 0.22
OC. 41.97
OD. 0.42
When a current flows in an aluminum wire of diameter 2.33 mm, the drift speed of the conduction electrons is 0.000279 m/s. The conduction electron density in aluminum is 6.00 x 10^28 m^-3.
What is the electron current?
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...
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Similar questions
- A conductor has a cross-sectional area of 2.3\( \times \)106 m² and the number of free electrons per unit volume is 8.5\( \times V1028 electron/m³. When the current is 8.5 A, find the drift speed (in mm/s) of the electrons. Use the charge of the electron to be 1.6\( \times \)1019 C. Select one: A. 35.67 B. 27.17 C. 0.36 D. 0.19 E. 0.27arrow_forwardA current of I=1.1 A is passing through a conductor with cross-section area A=6.5x10^-4m^2. The charge carries in the conductor, electrons, have a number density n=6.1x10^27m^-3. Part (a) Express the drift velocity of electrons through I,A,n and the fundamental charge e. Part (b) calculate the miracle value of v, in m/s. arrow_forwardA block in the shape of a rectangular solid has a cross-sectional area of 4.00 cm^2 across its width, a front-to-rear length of 5.00 cm, and a material conductivity of 10^6 Ω x m^-1. The block’s material contains 5.00x10^22 conduction electrons/m^3. A potential difference of 35.0 V is maintained between its front and rear faces. Find: (a) the resistivity of the block material(b) the resistance of the block(c) the current through the block(d) the magnitude of the current density if it is uniform(e) the drift velocity of the conduction electrons (f) the magnitude of the electric field through the blockarrow_forward
- A wire with a radius of 2.22mm is made of a conducting material that has an atomic mass of 72.0 grams/mole and a mass density of 6.17x103 kg/m3. You can assume that each atom of the material has one free electron associated with it. What is the drift speed vd in a 19.3 cm long section of wire that is carrying 664 Amps? Assume 3 significant digits and units of mm/s.arrow_forwardProblem 1. A copper wire of cross-sectional area 2.5 mm2carries a current with a current density of2.60 A/mm2. The density of free electrons for copper is 9.5x1028 electrons per cubic meter. Theresistivity of copper is 1.68x10−8 ·m. The charge of the electron is 1.6x10−19 C.(a) Calculate the current in the wire.(b) The magnitude of the drift velocity of electrons in the wire.(c) Find the electric field inside the wire.arrow_forwardA current is travelling along a wire. The cross-sectional area of the wire suddenly increases by 15%. If the current and the free-electron density are maintained, what is the new drift velocity of the electrons in terms of the initial drift velocity v→d?arrow_forward
- How much energy is imparted to an electron as it flows through a 20 V battery from the positive to the negative terminal? Express your answer in attojoules.arrow_forwardIf the density and atomic mass of copper are respectively 8.80 x 103 kg/m3 and 63.5 kg/kmol (note that 1 kmol = 1,000 mol), and copper has one free electron per copper atom, determine the following. (a) the drift speed of the electrons in a 10 gauge copper wire (2.588 mm in diameter) carrying a 12.5 A current m/s (b) the Hall voltage if a 3.08 T field is applied perpendicular to the wire Varrow_forwardAn aluminum wire with a diameter of 0.100 mm has a uniform electric field of 0.200 V/m imposed along its entire length. The temperature of the wire is 50.0°C. Assume one free electron per atom.(d) What is the drift speed of the conduction electrons? (e) What potential difference must exist between the ends of a 2.00-m length of the wire to produce the stated electric field?arrow_forward
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