Discharge Of Capacitor With Bang

Purpose

To demonstrate that capacitors store electrical energy.
 

Equipment

3500 microfarad capacitor, 100 volt battery pack, large beat-up screwdriver.

 

Images

j4-32

Description

A 3500 microfarad capacitor is charged to 100 volts using the battery pack. Discharging the capacitor with the large screwdriver produces a very loud BANG. Scare the whatever out of your students: tell them to listen carefully for the sound before discharging the capacitor.