Lesson: Electron Drift Velocity
In this lesson, we will learn how to calculate the average speed of electron motion in an electric current, known as the drift velocity.
Sample Question Videos
Worksheet: 3 Questions • 1 Video
A 10-gauge copper wire has a cross-sectional area of 5.26 mm2. The wire carries a current of 5.00 A. One mole of copper contains atoms has a mass of 63.50 g. What is the magnitude of the drift velocity of the electrons, assuming that each copper atom contributes one free electron to the current? Use a value of 89.5 g/cm2 for the density of copper.
What is the absolute value of the charge density in the wire?
What is the drift velocity of the electrons?
What would the drift velocity be if the same gauge copper was used instead of aluminum?
In a current-carrying copper wire with cross section , the drift velocity is 0.040 cm/s. Find the total current running through the wire. Use a value of m−3 for the number density of copper.