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 long, cylindrical wire with a length of 1.5 m and a cross-sectional area of 5.0 mm2 carries a steady current of 5.0 A. If the number density of free electron carriers in the wire is 8.0 x 1028 e- ' s/m3, what is the drift velocity of the free electrons that carry the current?   a. 6.5 x 10-7 m/s   b. 7.8 x 10-7 m/s   c. 4.2 x 10-7 m/s   d. 9.7 x 10-7 m/s   e. 2.1 x 10-6 m/s

In a wire with a 2.17 mm2 cross-sectional area, 7.19 × 1020 electrons flow past any point during 3.09 s. What is the current I in the wire? I = A Determine the current density J. J = A/m?

The current in a wire at time t is given by the expression I(t) = (2.4 A) e−t/(2.3 µs), where t is in µs. a. Graph I vs t for the interval 0 ≤ t ≤ 10 μs. b. Find an expression for the total amount of charge that has entered the wire at time t if Q(0) = 0 C. c. Graph the total amount of charge that has entered the wire as a function of time for the same interval as in part a.