Magnetic Flux

We can better understand or describe a "moving magnet" or a "changing magnetic field" in terms of magnetic flux. We define the magnetic flux as

You might think of the "air flux" as air blows through a window. The size of the window (A), the speed of the air (B) and the direction (theta) all determine how much air comes through the window.

Changing Magnetic Fields

Faraday's Law

Return to Ch 21, Electromagnetic Induction
(c) Doug Davis, 2000; all rights reserved