Static electricity and electrical currants

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<ul><li><p>October 9, 2013</p></li><li><p>Define and describe static electricityDefine and recognize the presence of a chargeDistinguish between conductors and insulatorsDescribe how static electricity is different than current electricity</p></li><li><p>Movement of charged particles</p></li><li><p>Rule 1: Like charges repel one anotherRule 2: Unlike charges attract one another</p></li><li><p>Electrons carry negative charges and protons carry positive charges</p><p>Electrons can move from atom to atomAn atom that has more electrons is negativeAn atom that has less electrons is positive</p></li><li><p>The imbalance of positive and negative charges</p><p>So how do we move electrons from one place to another? </p><p>By rubbing them together</p></li><li><p>The build up of electrons creates a static charge</p><p>The jumping of electrons from one object to another creates a static shock</p></li><li><p>When two objects are attracted the atoms dont move, only their charges</p><p>The positive part of one object will be attracted and move toward the negative charge of the other object</p><p>The objects have become polarized.</p></li><li><p>TRIBOELECTRIC SERIES your hand glass your hair nylon wool fur silk paper cotton hard rubber polyester polyvinylchloride plasticItems near the bottom tend to gain negative charges when rubbed with something near the top </p></li><li><p>Clouds become negatively charged relative to the ground</p><p>Lightning appear as charges are exchanged between the clouds and the ground</p></li><li><p>Currents made of flowing electrons, in one direction</p></li><li><p>Ampere (A) the rate of electrical flow</p><p>Coulomb (C) unit of chargeRelationship between charge and distance</p><p>1 C of charge (6.25 billion billion) per second</p><p>So a wire that carries 5 A has 5 coulombs of charge per second</p></li><li><p>Electrons flow only when there is a difference in electrical pressure voltageHigher the pressure (V) stronger the flow</p><p>Voltage = potential energy/charge</p><p>Wires need a pump that provides the voltage to cause flow</p></li><li><p>Simple Circuit</p></li><li><p>Have loosely held electrons that travel very easilyMost metals </p></li><li><p>Materials that do not allow electrons to travel freely</p><p>Plastic, cloth, glass and dry air </p></li><li><p>*</p></li></ul>