TOPIC:

ID Code: K4-51
Purpose: Demonstrate a very simple unipolar motor.
Description: A "motor" is formed as shown in the photograph at the left above: a cylindrical magnet (with its field along the axis of the cylinder, is stuck to the head of a nail with a small aluminum flag between the two, as seen in the photograph at the center above. The tip of the nail is then held by the magnetic field onto the positive end of a battery as seen in the first picture. A wire soldered to the negative end of the battery is then touched to the magnet, creating a current loop. The vxB force causes the nail and magnet to rotate clockwise as seen from above.
Availability: Available