Electric Potential

Electric Potential is the difference in electrical charge between two points in a circuit expressed in volts. This is used to show the affect of an electric field of a source that is represented in terms of the location within the electric field. A test charge with twice the amount of charge would compose twice the amount potential energy at a location even though electric potential at that specific location would be the same as any other test charge. Test charges that are positive would hold a high electric potential only near a source charge that is positive.  That positive test charge would show a low electric potential when held further away from the positive source charge. The work done in moving a unit charge from one point to another is equal to the difference in potential energies at each point.

Info: http://www.physicsclassroom.com/class/circuits/u9l1b.cfm

PC: http://tap.iop.org/fields/electrical/408/page_46882.html

Unit 7

We are now into Unit 7 of physics. For this unit we started off basic by talking about protons, neutrons, and electrons. Protons are positively charged. Neutrons are neutral. Electrons are negatively charged. We learned that opposite charges attract, and similar charges repel. However, a neutral and a neutral have no effect at all. We also talked about things like conductors, semi conductors, and insulators. Conductors allow charges to move about more or less freely. Semi conductors can be fine-tuned to display almost any desired degree of conductivity by controlling the concentration of the various components from which they are made. Insulators charge that are not free to move; most are nonmetallic substances and most are good thermal insulators. In this video I am rubbing the balloon on my sisters hair, and it makes her hair stand up. This is because the balloon is stealing the protons from my sisters hair, it is getting charged.