Enter your Sign-on user name and password.

Forgot password?
  • Follow us on:
Loading video...

Start Learning Now

Our free lessons will get you started (Flash® 10 required).
Get immediate access to our entire library.

Sign up for Educator.com

Features Overview

  • Get on-demand access to our complete library
  • Search and jump to exactly what you need to learn
  • Track your progress
  • Download practice and lesson files
  • *Ask questions and get answers from our community & instructors

Maxwell's Equations

  • There are four equations that constitute Maxwell’s equations:
    1. Gauss’s law: The integral of E.da over a closed surface is equal to the charge enclosed within the surface divided by epsilon_0.
    2. Gauss’s law in magnetism: The integral of B.da over any closed surface is zero.
    3. Faraday’s law: The line integral of E.dl over a closed path is equal to minus the derivative with respect to time of the flux through the closed path.
    4. Ampere-Maxwell’s law: The line integral of B.dl over a closed path is equal to mu_0*I plus mu_0*epsilon_0*(derivative of the electric flux with respect to time).
  • Maxwell’s equations predict the existence of electromagnetic waves that travel in vacuum with the speed of light.
  • In a plane electromagnetic wave, the electric field E and the magnetic field B are perpendicular to each other and both are perpendicular to the direction of propagation.

Maxwell's Equations

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

AP Physics C: Electricity and Magnetism