The Physlets website will be unavailable Friday evening through Saturday afternoon as electrical work occurs in the American Center of Physics server room. Down time will begin at 6PM Eastern Time on Friday. Service is expected to resume by 6PM on Saturday, July 30.
« · »

Physlets run in a Java-enabled browser, except Chrome, on the latest Windows & Mac operating systems. If Physlets do not run, click here for help updating Java & setting Java security.

Problem 24.8: Symmetry and field at distances far away

Please wait for the animation to completely load.

Although electric fields can be quite complicated close to a charge distribution, they often become very simple at large distances (position is given in meters and electric field strength is given in newtons/coulomb). Restart.

  1. What symmetries does each of these configurations have at large distances?
  2. When possible, find an analytical expression for the field at large distances using Gauss's law for each configuration.

Note that each configuration contains either point charges or line charges (into and out of the screen), but not both. You can measure the electric field strength by click-dragging in the animation.

The OSP Network:
Open Source Physics - Tracker - EJS Modeling
Physlet Physics
Physlet Quantum Physics