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Published byAngel Bradley Modified over 9 years ago
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What is a circuit? A set of connected electrical components that provide one or more complete paths for the movement of charges. A set of connected electrical components that provide one or more complete paths for the movement of charges. A complete path from one battery terminal to another = “closed circuit” A complete path from one battery terminal to another = “closed circuit” Any break in the path = “open circuit” Any break in the path = “open circuit”
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Circuit diagrams Circuit/schematic diagrams are used to represent electric circuits. Circuit/schematic diagrams are used to represent electric circuits. Symbols include: Symbols include: Wire Battery Resistor Light Bulb Switch +-
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Simple Circuit Diagram Simple circuit = power source, wire, and bulb
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Types of Circuits Two types: Two types: 1. Series circuit - provides a single conducting path without junctions. - the current has only one loop to flow through - the current has only one loop to flow through - the amount of current is the same through every part - the amount of current is the same through every part
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Series Circuits - Output devices that are connected in the same loop are in “series” - What happens when there is a break in the connection? BOTH LIGHTS GO OUT!!!
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2. Parallel Circuit - contains two or more branches for current to move through. - Individual parts can be turned off without affecting the entire circuit. Ex: electrical system in a house - Electrical energy enters your home at the circuit breaker or fuse box. - Electrical energy enters your home at the circuit breaker or fuse box. - Guards against overheating electric wires. - Guards against overheating electric wires. Types of Circuits
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Parallel Circuit A B What happens when switch A breaks the connection? Switch B?
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