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Published bySibyl Green Modified over 9 years ago

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Electrical Circuits Objective: What is a simple circuit? How does electricity flow through a simple circuit to produce heat, light, and sound?

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1. What is a closed circuit? An electrical circuit allows the movement of electrical energy.

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Closed Circuit

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1. What is an open circuit? This is an electrical circuit that prevents the movement of electrical energy.

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Open circuit

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2. Basic Parts of Circuit

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Basic parts of a circuit: Load (Receiver) (light bulb) Power Source (battery) Wires Switch

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LOAD (Receiver): The part of the circuit that changes electrical energy into another form of energy. Example: electrical energy is transformed by the load of the light bulb to light and thermal energy when the light is turned on.

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Reality Check: What is a simple circuit? How does electricity flow through a simple circuit to produce heat, light, and sound?

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3. Series Circuit

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Series Circuit: A circuit that allows only one path for the flow of electricity.

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Series Circuit: This type of circuit will not work if one or more light bulbs go out.

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If bulb A burned out, no current could flow through the circuit. A BC

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If bulb B burned out, no current could flow through the circuit A BC

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Question: What would happen if bulb C burned out? A BC

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Refrigerator Example: If your refrigerator was wired by a series circuit and one light bulb burned out, the whole refrigerator would stop working.

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4. Parallel Circuits

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Parallel Circuit This is a circuit that allow electric current to flow along more than one path.

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Parallel Circuit This type of circuit will work if one or more light bulbs go out.

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If bulb A burned out there would still be current the could flow through the circuit. A B C

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If bulb B burned out there would still be current the could flow through the circuit. A B C

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Question: What would happen if bulb C burned out? A B C

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Quick Review:

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Sample Question 1: Which circuit is a parallel circuit? A B

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Sample Question 2:This is a parallel and series circuit mixed together. What would happen if Bulb C burned out? Would the circuit still work? C A B D

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Sample Question 3:This is a parallel and series circuit mixed together. What would happen if Bulb B burned out? Would the circuit still work? A C B

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