CIRCUITS AND Standards SPI0607.12.1 Identify how simple circuits
CIRCUITS AND Standards SPI0607.12.1 Identify how simple circuits are associated with the transfer of electrical energy when heat, light, sound, and chemical changes are produced. What is Electricity?
Like sound and light, electricity is a form of energy. Electrical energy can change into other forms of energy such as heat, light, sound, and energy of motion. These changes can take place within a system that acts like a path in which electrical energy can flow.
Parts of an Electrical Circuit Electrical energy is the energy of charged particles in matter. It can be used to make light, heat, make things move (like an electric fan), etc. To get electrical energy to go where you want it to go, you must give it a
path to follow An electrical circuit is a path for the flow of electricity. Humans set up electrical circuits so that they can Parts of an Electrical Circuit An electrical circuit has 3 main parts. 1. A Source of Electrical Energy 2. An Output Device 3. Connectors between the two
Batteries Wire Light Parts of an Electrical Circuit An electrical source can be anything
that supplies electricity. When you plug in a lamp into the wall, you are plugging it into an electrical source. Batteries are also electrical sources. An output device is anything that can use the electricity. A light bulb, toaster oven, an alarm, and a fan are all examples of output devices. In the circuit below, what is the
electrical source? The battery What is the output device? The light bulb Wires connect the two, completing the circuit, creating an electric current. This circuit shown below should work.
But a circuit like this has a problem. Electrical energy would flow until the battery ran out of energy. You would not be able to turn the light off without breaking the circuit. This is why most circuits have a way of turning the flow of electrical current on and off. A switch is a device that opens and closes a circuit.
Instead of just wires connecting the battery directly tothe light bulb, in this example there is a switch, made of metal like the wire, that can be used to open and close the circuit. When the circuit is closed, the electrical
current can pass Open and Closed Circuits A closed circuit is a complete path for the flow of electricity. A closed circuit does not have any break in it. An open circuit has a break in the flow of electricity.
Open and Closed Circuits Which picture shows an open circuit? Closed circuit? Closed ! Open !
This switch works the same way a light switch works. https ://www.youtube.com/watch?v=AVFkDMtf6Eo Series vs. Parallel Circuits Series circuits In a television series, you get several episodes, one
after the other. A series circuit is similar. You get several components one after the other. If you follow the circuit diagram from one side of the cell to the other, you should pass through all the different components, one after the other, without any branches. Series = One big loop Series vs. Parallel Circuits
Series circuits If you put more lamps into a series circuit, the lamps will be dimmer than before. In a series circuit, if a lamp breaks or a component is disconnected, the circuit is broken and all the components stop working. Series vs. Parallel Circuits Parallel circuits
In parallel circuits different components are connected on different branches of the wire. If you follow the circuit diagram from one side of the cell to the other, you can only pass through all the different components if you follow all the branches.
Series vs. Parallel Circuits In a parallel circuit, if a lamp breaks or a component is disconnected from one parallel wire, the components on different branches keep working. And, unlike a series circuit, the lamps stay bright if you add more lamps in
parallel. Energy Changes in Circuits The wires in the walls of your home form circuits. When you plug in a fan, the fan becomes part of one of those circuits. The form of energy that electrical energy changes into depends on the output device. Your fan changes electrical energy to mechanical
energy, in the moving fan blades. But not all of the energy moves the blades. If you are close, you can hear it turning. It may also become warm after a while. This indicates that some of the electrical energy that flows into the fan
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