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2013-05-16 23:01:17

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  1. what is electricity
    is the movement of electrons through something( medium)
  2. What are the 2 reasons why electrons move
    • 1. they are attracted to protons
    • 2. they are hit by another electron and bounce out of the way
  3. What is electricity similar to
    water moving in a hose
  4. What is a circuit
    a complete pathway for electrons to travel
  5. What happens in a complete circuit
    electrons must be able to move back to their starting point
  6. What 3 main parts do circuits have
    • 1. source of power/electrons ex:battery
    • 2. medium for electrons to travel ex: wire and other conductors
    • 3. something for electrons to do work on ex: light bulb
  7. Define resistor
    designed to slow down the flow of electrons
  8. What material is resistor made of
    made of material that isn't quite considered to be a conductor, but isn't an insulator either
  9. Different materials allow circuits to have ______ resistances
  10. What does a switch allow you to do
    allows you to disconnect the circuit when you want electrons to stop flowing and reconnect when you want electrons to resume flowing
  11. define closed circuit
    circuit is complete and electricity can travel thru it
  12. define open circuit
    circuit is incomplete and electricity cannot travel thru it. Usually, this occurs when you move a switch to the off position
  13. define series circuit
    all the objects that work is done are in a straight path
  14. How you you travel in a series circuit
    you can travel from one object to the next only one way. Are no options
  15. Define parallel circuits
    objects that work is done on are not in a straight path
  16. How do you travel in a parallel circuit
    you have options to how you can travel from one object to the next
  17. what is an electrical current
    electrons in motion
  18. what are the 2 main types of currents
    Alternating and direct
  19. Alternating electrons constantly ________ like in an ____
    change directions, outlet
  20. Direct electrons move _________ like in a ______
    only in one direction, like in a battery
  21. How is current measured
    is measured in terms of the rate at which electrons travel through a circuit
  22. What unit is current symbolized in?
    Amperes or Amps (A)
  23. What is the tool used to measure current
  24. What is voltage?
    is the measure of the amount of force (pressure) that keeps the electrons flowing across circuit
  25. Define medium?
    where electrons go through
  26. Define AC and an example
    electrons constantly change directions. Ex: outlet
  27. Define DC and an example
    electrons move only in one direction. EX: battery
  28. What is the two reasons why electrons move.
    • 1. Are attracted to protons.
    • 2. They are hit by another electron and bounce out of the way.
  29. Define power
    is a quantity that measures the rate at which work is done
  30. define current
    rate at which electrons travel through a circuit
  31. define resistance
    how much the flow (current) is restricted by the material (resistor)
  32. What causes resistance
  33. What two relationships are described in Ohm's Law? What's the equation.
    Current is directly related to volts and inversely related to resistance.
  34. If the distance between two objects is cut in half and the charges remain the same, how much will electrical force between them change?
  35. If the charges of only one object doubles, how much will the force between them change?
  36. When a circuit is complete, it is called a
    closed circuit
  37. A unit to tell you the amount of charge in an object
  38. Rate at which electrical work is done
    electrical power
  39. When does circuits become overloaded
    when the resistance is too low
  40. Complete pathway for electrons to travel.
  41. Caused by pressure differences across a resistor
  42. Amount the current decreases when electrons pass through a resistor
  43. The force between two objects is ____ related to the square of the distance between the objects
  44. In the coloumbs law , what does q1 and q2 represent
    represent the charges of the two objects
  45. Caused by improper, wiring, occurs when electrons have accidental alternate path of travel causing an overloaded circuit?
    short circuit
  46. Tells is the relationship among force between two objects, charges of the objects, and distance between the objects.
    coloumbs law
  47. You shock others because you have an excess of these particles in your body.