This demonstration consists of a 3kV, 580 μF capacitor mounted on a dolly with a 1kV power supply mounted above it.
Discharge a capacitor charged up to 1kV with an impressive 'bang!'. This effectively illustrates how energy can be stored with capacitors, this can also be used to talk about RC circuits (an example of an RC circuit with a very short time constant).
Also provides an exceedingly effective method to wake up drowsy undergrads.
The notes below are just an expanded transcription of the text of the checklist included with the demo. When running this demonstration, keep the checklist handy and refer to it if there's any doubt.
Any time you're about to touch the leads be sure to short the terminals together multiple times immediately before doing so. If you charge it up to 1kV, discharge it, and come back a couple minutes later to place the short wire on the terminals, you may recieve a nasty shock! Dielectric Absorption is responsible for this. If the capacitor is left un-shorted for any amount of time, it's healthy to assume it has some charge stored.
You must get assistance from demo room staff if you have not operated this demo before.
It requires high voltages and can be dangerous if not done correctly. Please wear ear and eye protection.
Demo room information