8-1 Electric Charge


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8-1 Electric Charge

  1. 1. Warm-up(Own Paper!!)<br />What is kinetic energy?<br />It is the energy due to motion or the energy of moving objects.<br />What happens to kinetic energy when a ball is thrown up into the air. <br />Gravity converts the kinetic energy into potential energy.<br />
  2. 2. Warm- Up<br />Where is the force of gravity directed?<br />Down<br />What is the acceleration due to gravity?<br />9.8 m/s2<br />What are the two types of charge?<br />Positive & Negative <br />
  3. 3. 8-1: Electric Charge<br />Analyze factors that affect the strength and direction of electric forces and fields.<br />Describehow electric forces and fields affect electric charges.<br />Describe how electric charges are transferred and explain why electric discharges occur.<br />
  4. 4. Electric Charge<br />Electrical energy<br />Energy associated with electrical charges.<br />Electrical charges<br />A property that causes subatomic particles such as protons and electrons to attract and repel each other.<br /> Protons – positive<br /> Electrons – negative <br />
  5. 5. Charged objects<br />Objects become charged because there is an imbalance of protons and electrons.<br />Positive charge<br />More protons than electrons.<br />Negative charge<br />More electrons than protons.<br />Uncharged <br />Equal numbers of each.<br />
  6. 6. Charging Objects<br />Friction<br />Rubbing two objects together.<br />Balloon on hair, shoes on carpet, etc.<br />Conduction<br />Charge is transferred by contact.<br />Induction<br />A transfer of charge with out physical contact.<br />Conservation of Charge<br />The overall charge in the isolated system remains constant.<br />
  7. 7. Conduction<br />
  8. 8. Induction<br />
  9. 9. Electric forces<br />Like charges repel.<br />Opposite charges attract.<br />The electric force between two objects is directly proportional to the net charge on each object.<br />The electric force is indirectly proportional to the square of the distance between each object.<br />
  10. 10. Electric Fields<br />The space around the electric charge over which the charge exerts a force.<br />Electric field strength depends on:<br />The amount of charge that produces the field.<br />The distance from the charge.<br />
  11. 11. 2 Forms of Electricity<br />Static – a build up of charge on an object<br />Current – a steady flow of electrons through a conductor<br />
  12. 12. Conductors and Insulators<br />Insulators:<br />Slow or stop the flow of electrons.<br />Ex. Rubber, Glass, Plastic<br />(the rubber coating on the outside of an electrical cord)<br />Conductors:<br />Allow a free flow of electrons<br />Ex. Metals <br />(the wire inside an electrical cord)<br />
  13. 13. Conclusion<br />Write a short paragraph describing the interactions between charges.<br />Two types of charges<br />The forces between charges<br />Way charges are transferred to and from surfaces.<br />