Lesson: Current DensityPhysics
In this lesson, we will learn how to describe current density as a vector determining the electric current through an area perpendicular to the current direction.
Sample Question Videos
The current supplied to an air conditioner unit is 4.00 A. The air conditioner is wired using a 10-gauge (diameter 2.588 mm) wire. The charge density in the wire is electron/m3.
Find the magnitude of current density in the air conditioner’s wiring.
Find the magnitude of the drift velocity in the air conditioner’s wiring.
An electron beam with a radius of 0.90 mm has a measured current . What is the magnitude of the current density of the beam?
A high-energy proton accelerator produces a proton beam with a radius mm. The constant beam current μA. The beam’s charge density protons/m3.
What is the magnitude of the current density of the beam?
What is the magnitude of the drift velocity of the beam?
How much time is required for protons to be emitted by the accelerator?