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Electric Currents and Electric Circuits

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  • an electric current that continually flows in ONE direction
    direct current
  • the unit used to count electric charges
    coulomb
  • TRUE/FALSE: Flashlights use direct current.
    TRUE
  • circuit in which there is only ONE path for the electric current to follow
    series circuit
  • the movement of electrically charged particles
    electric current
  • Moving electrons have ___ energy.
    kinetic
  • In houses, there are __ circuits.
    parallel
  • What are the FOUR parts of a simple circuit?
    switch, electric energy source (battery), electric device (lightbulb), electric conductor (wire)
  • circuit in which there is MORE THAN ONE path for the electric current
    parallel circuit
  • part of an electric circuit that allows for it to be turned on and off
    switch
  • an electric current that continually REVERSES direction
    alternating current
  • How do electrons move through a battery?
    Chemical reactions within a battery move electrons from one end of the battery (positive terminal) to the other end (negative terminal).
  • An electric motor in a circuit transforms electric energy to __ energy.
    mechanical
  • electromagnetic radiation that can be seen
    light
  • a definite quantity of electricity; can be positive or negative
    electric charge
  • TRUE/FALSE: A good conductor has little electric resistance so electric current can flow through it.
    TRUE
  • A heating device in a circuit transforms electric energy to ___ energy.
    thermal
  • TRUE/FALSE: TVs, computers and other appliances use alternating current.
    TRUE
  • a closed path in which an electric current flows
    electric circuit
  • Most current used in homes and businesses is ___ current
    alternating
  • a machine that transforms mechanical energy to electric energy
    generator
  • a measure of how difficult it is for an electric current to flow in a material
    electric resistance
  • the amount of energy used to move one coulomb of electrons through a circuit
    voltage