1. THE LEYDEN
JAR

2. Presentation
Good morning to everybody, we are three
Haig school students doing a technological
processes.
The members of the group are: Gerard,
Ariadna and Oriol.
Now we are going to talk about our project
Our project is: THE LEYDEN JAR

3. DEFINITION
The Leyden jar is a capacitor and an
electronic device that is used to store
electrical energy. They are only used
to store the electrons and they are
not capable of producing
them.

4. INVENTION OF THE CAPACITOR
Ewald Georg von Kleist
There are many stories behind the invention of the
capacitor. A German scientist named Ewald Georg von
Kleist was known to invent the capacitor in November
1745. But, he did not have any detailed notes or records
of his invention. So, he was given the credit for evolution
of the capacitor.
Ewald Georg von Kleist

5. PIETER VAN MUSSCHENBROEK
A few months later a Dutch professor called Pieter
van Musschenbroek found a similar device called
the Leyden Jar. Scientists approved this to be the
first capacitor. After years, both the scientists have
been given equal credit for the invention of the
capacitor.
Pieter Van Musschenbroek

6. Benjamin Franklin
Years later, Benjamin Franklin experimented with the Leyden
Jar, and was able to make a smaller capacitor which was
named as Franklin Square after him. Later English chemist
Michael Faraday began experimenting on the Leyden Jar,
and invented the first commercial capacitor. This capacitor
was made from large oil barrels. This was later progressed in
such a way that electric power could be delivered to very
large distances.
Benjamin Franklin Michael Faraday

7. THE LAYDEN JAR
The Leyden Jar basically consists of a glass jar, which was lined
inside and outside with metal foils usually made of lead. The glass
jar was half filled with water. The glass jar was used as the
dielectric. A brass rod is introduced from the top of the glass jar. A
static supply was then given from the brass
rod into the jar.
When this is delivered the jar will store two equal,
but opposite charges in equilibrium which
passes on to the ground if a ground wire is given.
The figure of a Leyden Jar is given below.

8. WORING OF A CAPACITOR
A capacitor is defined by the type of dielectric
selected. It also defines the application of the
capacitor. According to the size and type of dielectric
used, the capacitor can be used for high-voltage as
well as low-voltage applications. For applications in
radio tuning circuits air is commonly used as the
dielectric. Take a look at the figure given below to
know about dielectric in a capacitor:

9. The Parts of a
leyden Jar

10. HOW TO MAKE A LEYDEN JAR
http://www.youtube.com/watch?v=MlitL7u0FpU&feature=endscre
en&NR=1

11. Personal Evaluation and
Conclusions

12. End
Thanks you for
your attention
Ariadna- Gerard- Oriol