Physics Demonstrations at Cal Poly Pomona
Demo Index:
Pira Index:
Title:
Description:
A simple capacitor made from a common film canister. Shows the storage of charge in a capacitor.
Equipment:
1. Film canister leyden jar
2. PVC electrophorus w/ charge plate
3. Discharging tongs
4. Paper towel
Before using, fill the canister leyden jar about 3/4 full of water.
Before returning the canister to the shelf, be sure it is emptied and dried out.
Procedure:
1. Charge up the electrophorus by rubbing the base with paper towel. Place the plate w/cup handle on the base. Touch the plate with your finger, then lift the plate by the cup.
2. Touch the plate to top of the small leyden jar.
3. Repeat steps 1 & 2 several times
4. Touch the top and bottom of the canister with the discharging tongs.
