Faraday's Law of Induction

• Magnetic braking is not an efficient way to stop a falling person.

• Magnetic Flux is the amount of magnetic field passing through some area. It can be defined as

  
           magnetic flux   =  (magnetic field) * (effective area)
  
                           =  (magnetic field) * (area) * cos(theta)
  

  where theta is the angle between the area and the magnetic field; it has the sense that theta = 0 degrees is face-on, and theta = 90 degrees is edge-on.
• The units of magnetic flux are (Tesla * meter^2) = Weber
• Faraday's Law says that the voltage induced in a loop of conducting material is equal the the rate of change of magnetic flux through it:

                                   change in magnetic flux 
           induced voltage =   N * ------------------------
                                       time to change
  

  where N is the number of turns or coils of the conductor.

Copyright © Michael Richmond. This work is licensed under a Creative Commons License.