A current of I = 1.1 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 = 7.7 x 1027 m-3. Part (a) Express the drift velocity of electrons through I, A, n, and the fundamental charge e. vd = (I/A n e) is an incorrect equation. Part (b) Calculate the numerical value of v, in m/s. vd =

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current of I = 1.1 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 = 7.7 x 1027 m-3.

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,...

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Concept explainers

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.

Question

A current of I = 1.1 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 = 7.7 x 10²⁷ m^-3.

Part (a) Express the drift velocity of electrons through I, A, n, and the fundamental charge e.

v_d =

(I/A n e) is an incorrect equation.

Part (b) Calculate the numerical value of v, in m/s.

v_d =

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