PURPOSE: To demonstrate an electromagnet.

DESCRIPTION: Close switch to pick up junk with coil. Release switch to let junk fall. Some light items may cling to the magnet after the switch is released due to residual magnetism of the core.

SUGGESTIONS:

REFERENCES:

EQUIPMENT: Electromagnet with core, power supply, switch and box of magnetic and non-magnetic junk.

SETUP TIME: 5 min.

Go back to Lecture-Demonstration Home Page.