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Published byRudolph Barber Modified over 4 years ago

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ELECTRICAL CIRCUITS

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What is an electric current? Electric Current - a flow of electrons from the (+) terminal to the (-) terminal of a cell/battery through wires and components + -

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Open and Closed Circuits Open circuit = switch is open = no current is flowing = bulb does not light Closed circuit = switch is closed = current is flowing = bulb lights up

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Circuit Diagram Cell/Battery Switch Bulb Wires Resistor in a bulb Resistor

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Circuit Diagram

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Types of Circuits Series Circuits – current takes only one path and is the same at all the points

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Series Circuits If one bulb blows out, it breaks the circuit and all the bulbs go out If you add more cells/batteries to a series circuit, the bulbs burn brighter

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Types of Circuits Parallel Circuits – current takes more than one path and is NOT the same at all the points

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Parallel Circuits If one bulb blows out, there is still another complete circuit for the bulb to stay lit

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Conductors and Insulators Conductors – objects in which electrical current easily passes through such as metals Insulators – objects that resist the flow of electrical current such as plastic, wood, paper, and rubber

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Conductor or Insulator? Conductor

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Open or Closed? Closed

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Brighter or Dimmer? Dimmer

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Series or Parallel? Series

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Brighter or Dimmer? Brighter

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Series or Parallel? Parallel

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Open or Closed? Closed

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Series or Parallel? Series

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Series or Parallel? Parallel

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B

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A - Resistor

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B - Switch

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C - Bulb

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D – Wire

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E - Cell/Battery

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A – Parallel B – Series

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