A current of 1 = 7.62 A is passing through a conductor with cross sectional area A = 7.11 x 104 m². The charge carriers in the conductor, electrons, have a number density of n = 6.39 x 1027 m-3. A Enter an expression for the drift velocity of electrons in terms of the current, I, the cross-sectional area, A, the number density, n, and the fundamental charge, e. What is the numerical value, in meters per second, of the drift velocity?

A current of 1 = 7.62 A is passing through a conductor with cross sectional area A = 7.11 x 104 m². The charge carriers in the conductor, electrons, have a number density of n = 6.39 x 1027 m-3. A Enter an expression for the drift velocity of electrons in terms of the current, I, the cross-sectional area, A, the number density, n, and the fundamental charge, e. What is the numerical value, in meters per second, of the drift velocity?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 15P: If the current carried by a conductor is doubled, what happens to (a) the charge carrier density,...

See similar textbooks

Similar questions

If the current carried by a conductor is doubled, what happens to (a) the charge carrier density, (b) the current density, (c) the electron drift velocity, and (d) the average time interval between collisions?
Figure P21.6 represents a section of a conductor of nonuniform diameter carrying a current of I = 5.00 A. The radius of cross-section A1 is r1 = 0.400 cm. (a) What is the magnitude of the current density across A1? The radius r2 at A2 is larger than the radius r1 at A1. (b) Is the current at A2 larger, smaller, or the same? (c) Is the current density at A2 larger, smaller, or the same? Assume A2 = 4A1. Specify the (d) radius, (e) current, and (f) current density at A2. Figure P21.6
Taking R = 1.00 k and = 250 V in Figure P21.49, determine the direction and magnitude of the current in the horizontal wire between a and e. Figure P21.49
Consider a wire of a circular cross-section with a radius of R = 3.00mm. The magnitude of the currentdensity is modeled as J=cr2=5.00106Am4r2 . Whatis the current through the inner section of the wire from the center to r = 0.5R?
A current of I = 7.3 A is passing through a conductor with cross sectional area A = 6.5 × 10-4 m2. The charge carriers in the conductor, electrons, have a number density n = 2.1 x 1027 m-3. Calculate the numerical value of the drift velocity, v, in m/s. vd =
A current of I = 4.6 A is passing through a conductor with cross sectional area A = 3.5 × 10-4 m2. The charge carriers in the conductor, electrons, have a number density n = 1.2 x 1027 m-3. Part (a) Express the drift velocity of electrons through I, A, n, and the fundamental charge e. Part (b) Calculate the numerical value of v, in m/s.
A copper wire has a circular cross section with a radius of 1.06 mm. (a) If the wire carries a current of 3.38 A, find the drift speed (in m/s) of electrons in the wire. (Take the density of mobile charge carriers in copper to be n = 1.10 ✕ 1029 electrons/m3.) ???m/s (b) For the same wire size and current, find the drift speed (in m/s) of electrons if the wire is made of aluminum with n = 2.11 ✕ 1029 electrons/m3. ???m/s
hw6 A current of I = 1.4 A is passing through a conductor with cross sectional area A = 4.5 × 10-4 m2. The charge carriers in the conductor, electrons, have a number density n = 9.7 x 1027 m-3. Calculate the numerical value of v, in m/s.
2) What is the drift speed of electrons in the 12-gauge wire of a certain conductor in a typical building of the UET physics lab having cross- sectional area of 3.31 um^2 and carries a uniform current of 10000.0 mA? Suppose each atom of the conductor contributes one free electron to the current, whereas the molar mass and density of the conductor is 63.5 g/mol and 8.92 g/cm^3.* Ob) 3 mf O c) 2.3 PF od) 2.1 m e) 2 UF f) 2 mF O F g) 1 m F O HINE
The vector current density of a 3m long and 3mm diameter conductor is given as 155630 A/m^2. Determine the curent on the conductor, its free electron density, the drift velocity of the charges and the number of electrons passing through the conductor for 3 seconds.
The figure below represents a section of a circular conductor of nonuniform diameter carrying a current of I = 5.70 A. The radius of cross-section A1 is r1 = 0.290 cm. (a) What is the magnitude of the current density across A1? a/m^2, Assume A2 = 2A1., (d) Specify the radius at A2.mm, (e) Specify the current at A2. A, (f) Specify the current density at A2. a/m^2
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:____.