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Electrical Circuits

Electrical Circuits. Getting the Idea. Whenever you turn on a lamp or watch TV, you are using electrical energy . This energy is in the form of a flow of charged particles called an electric current . Electric current moves in predictable ways.

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Electrical Circuits

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  1. Electrical Circuits

  2. Getting the Idea • Whenever you turn on a lamp or watch TV, you are using electrical energy. This energy is in the form of a flow of charged particles called an electric current. Electric current moves in predictable ways. • An electrical circuit is the path that an electric current takes.

  3. Electrical Circuits • Electrical circuits allow electrical energy to do work. Electrical energy can do work only in a closed circuit. • A loop through which electric current travels • Does not have any breaks in it • An open circuit has at least one break in the loop that interrupts the flow of the current.

  4. A closed circuit and an open circuit have three main parts: • 1. An electrical source • 2. an output device • 3. and a connection between the source and output device

  5. Electrical sources can be anything that supplies electric current • Examples: sockets, batteries, etc. • An output device is anything that uses electric current • Examples: light bulb, refrigerator, etc

  6. The connection between a source and an output device must be a conductor. • Electrical Conductors allow electric currents to easily pass from the source to the output device without any resistance • Good conductors of heat are also good conductors of electric current • Example: metal wire, especially copper

  7. Electrical Insulators are materials that resist the flow of electricity. • Electricity does NOT pass easily through them. • Examples: electrical tape, plastic, or wood

  8. When two or more output devices are connected in a circuit in a single loop, it is called a series circuit. In a series circuit, electric current flows into one output device and then flows into the next. If you remove one of the output devices, the other will not work Series Circuits

  9. Review • The Blobz Guide to Electrical Circuits: • http://www.mystery-productions.info/hyper/Hypermedia_2003/Thelwell/Site/ • Who Can Resist?: • http://www.sce.com/kidsscience/wires/game.html • Engineering Interactive: Electricity, simple circuit • http://www.engineeringinteract.org/resources/siliconspies/flash/concepts/simplecircuits.htm

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