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