You will find magnetic field pattern for a current flow in a vertical wire. Press "play", the wire will become a circular current loop. When it "paused" again, press "play" again. And it will wound in the form of a helix. (solensolid) You can change the Radius R or change the Z-plane to view field distribution at different Z value. The popup window shows the magnetic flux distribution.

Virtual Physics laboratory Original URL

Fu-Kwun Hwang, Dept. Of Physics, National Taiwan Normal University.