basic electrical circuits advanced design applications mr. brooks
TRANSCRIPT
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Basic Electrical CircuitsAdvanced Design ApplicationsMr. Brooks
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What is electricity? The movement of electrons through an
electrical circuit.
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Electrons Atom has three parts
Proton Neutron Electron
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Key terms Current: The flow of electrons through a
circuit. The amp is the unit of electrical flow.
Voltage: The electromotive force that pushes electrons through a circuit. The volt is the unit of electromotive force.
Resistance: The opposition to the flow of electrons. The ohm is the unit for the resistance to electrical flow.
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Where does electricity come from? Three main sources:
Occurs naturally Direct current (Batteries) Alternating Current(Generators)
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Electricity in nature Lightning Solar storms Electric eels Polar auroras
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Direct Current Direct current is a unidirectional flow of
electric current. Electricity flows at a constant, steady rate.
Examples of power sources that use AC are: Batteries Solar Cells
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Alternating Current Alternating Current is a flow of
electricity that is not constant. In fact the direction of current flow periodically switches direction.
Examples of AC are: Generators Home power outlets
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Generator A generator uses magnetsMagnets to push electrons through a circuit,much like a pumppushes water through a pipe.
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Breadboard A breadboard is a prototyping device
that allows the user to create/experiment with electrical circuits.
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Resistors We will now construct the “resistor”
circuit in our electronics labs and answer the following questions in your notes.
What does a resistor do? How does it work? What devices use resistors?
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Diodes We will do the “diode” circuit in our
electronics labs. What is a diode? How does it work? What devices do you thinkUse diodes?
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LED We will do the “LED” lab in our
electronics lab kits. What is an LED? How does it work? What devices use LEDs?
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Capacitor We will do the “capacitor” activity in our
electronics lab kits. What is a capacitor? How does it work? What are some devices that use capacitors?