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 28.7: Wire with uniform current

Please wait for the animation to completely load.

The gray circle in the center represents a cross-section of a wire carrying current coming out of the computer screen (position is given in millimeters, 10-3 m, and magnetic field strength is given in millitesla, 10-3 T). The current is uniformly distributed through the wire. The black circle is an Amperian loop with a radius you can change with the slider. Restart.

  1. What is the direction of the current in the wire?
  2. What is the current in the wire?

Problem authored by Anne J. Cox.

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