Why does your home have a circuit breaker or fuse box?
Circuit SymbolsWire (conductor)
Light bulb
Closed switch
BatteryOpen switch
Circuit Types
Series CircuitCurrent has only one
loop to flow through.
Ex. Flashlight, holiday lights
Parallel CircuitContains two or more branches for
current to flow through.
Ex. Homes, autos.
Circuit Types
Series Circuit Parallel Circuit
Complex Circuit
A circuit composed of both series and parallel circuits.
Electrical energy enters your home at the circuit breaker or fuse box and branches out to appliances, wall sockets, and lights.
Circuit breaker – small piece of metal that bends when it gets hot, opening the circuit and stopping current flow
Electric fuse – small piece of metal that melts if current becomes too high, opening the circuit
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