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8-1 Electric Charge
 

8-1 Electric Charge

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    8-1 Electric Charge 8-1 Electric Charge Presentation Transcript

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