#63

One thing used in the seventeenth and eighteenth century to study static electricity was the Leyden jar. This device consisted of 2 conductors separated by an insulator, usually tin foil on either side of a piece of plastic or glass. It is used by being charged by a static generator. The electricity flows into the jar and stays there. After being charged, a person can connect the conductors, causing a spark and the charges to discharge, resulting in the jar to be neutralized.
Another thing used to study static electricity is the Wimshurts machine. This decive is an electrostatic generator that has rotating disks with metal carriers in them. When used, the charges are produced by induction.

Problem 63

The Leyden jar is an early device for storing electric charge invented in 1745 by Pieter van Musschenbroek(1692–1761). It was the first capacitor. Leyden jars were used to conduct many early experiments in electricity.
The Wimshurst machine is an electrostatic device for generating high voltages developed between 1880 and 1883 by British inventor James Wimshurst (1832 – 19003). It has a distinctive appearance with two large contra-rotating discs mounted in a vertical plane, two cross bars with metallic brushes, and a spark gap formed by two metal spheres.

Chapter 20-#63

Chapter 20-#63

Several Devices were used in the seventeenth and eighteenth centuries to help scientists learn more about static electricity. One example is the Leyden Jar. This device was the first to be capable of storing large amounts of charge. First constructed in 1745, it was a glass vial filled partiallly with water and a thick conducting cable and the vial was sealed at the top with a cork. It was used to kill animals through electric shock in early households and was a breakthrough in the study of electrostatics. Another device used to study electrostatics was the wimshurst machine. Constructed of a generator, glass disks and metal carries, this device sent charges through induction. It is an excellent example of charge separation and a great early discovery that helped scientists learn more about static elctricity.

Blog Post for Fridays Class

• Went over homework


• Worked on a lab about static electricity

In this static electricity lab we detected the presence of an electric charge using a known charge. We used an electroscope to determine different charges of materials. We then built a table showing different charges of different objects, such as the black rod and the fur or the clear plastic rod and the silk.

• We were given graded homework from chapter 20 in the physics book.

question 63

The most important devises used to study electric energy in the 17th and 18th century were the Ledyen Jar and the Wimshurst machine. The Ledyen jar was discovered first in 1745, by Pieter van Musschenbroek. It was the first device that was able to store large amounts of electrical energy. With in a year of its creation, William Watson made some improvements on the constriction of the machine. It is a cylindrical container, made out of an insulator, with a layer of metal foil on either side of the cylinder. The outer side of the cylinder is grounded, while the inner side is given a charge. This enables the container to store electrical energy. The Wimshurst machine was created in the 1880s, by James Wimshurst. Unlike the Ledyen jar, the Wimshurst machine generates electrical energy, opposed to storing it. It is a machine consisting of two large contra-rotating discs that are mounted in a vertical plane, with two cross bars with metallic combs/brushes and a spark gap that is formed by two metallic spheres. The machine generates high voltages through induction. Within the machine there are quadrants of positively and negatively charged space, as the discs rotate, the metallic combs conducts the negative and positive charges away. Before this occurs, the machine already has an imbalance of charges, from human contact and such while it was being set up, and running the machine merely amplifies that imbalance.