Stroing Static Electricity
Credit: Walter Larden
License: CC BY-NC 3.0
Created in 1745, the Leyden jar was created to store static electricity to be used in some of the earliest experiments in electricity.
News You Can Use
- A Leyden jar consists of a glass jar that has a conducting foil (in this case aluminum) that coats the inner and outer surface. A metal rod which is in contact with the inner surface is held in place and inserted through a stopper at the top of the jar. The rod allows the inner surface to be electrically charged by touching the metal rod with an external electric charge.
- Because it can store electrical charge, the Leyden jar serves as a basic form of a capacitor. A capacitor is a system in which two conductors carry equal but opposite charge. The capacitance of a typical Leyden jar is approximately 1 nF. Capacitance is defined as the charge divided by the potential difference between the two conductors.
- Learn more about the history of the Leyden jar and how it was created below:
Show What You Know
- Why is the gold leaf attracted to the hands of the person laying on the swings in the video?
- If 88 pF capacitor is charged to 12 V, how much charge is transferred from one plate to another?
- Since the charge is uniform on the charged foil, would you expect the electric field between the charged surfaces to be uniform or non-uniform?