5N20.40 - Giant Tesla Coil
Demonstrate electromagnetic radiation.
Warn the class about the dangers involved in this experiment, especially so anyone with a pacemaker or sensitive medical electronics can leave the room (or be wrapped up in grounded Aluminum foil as a Faraday cage). Turn on the Tesla coil and watch it spark.
Radiation produced by this machine can disrupt a computer, or other device such as nedical electronics or personal electronic devices eg. 'ipod'.