Download Electrical Circuits

Electrical Circuits
Ch 7 Sect 3
Electrical Circuits
 Electrical circuits will always have a
minimum of 3 parts
1. Voltage Source-A device that provides the
electrical flow
2. Conductor-A device that will allow the
electricity to flow through
3. A device to do work–
Example-Light, Drill, Circular saw
Types of Closed Circuits
1. Series Circuit-A circuit that has only one
loop for electrons (current) to follow
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Used in simple devices such as flashlights
and some Christmas lights
series circuit
Types of Closed Circuits (cont)
2. Parallel Circuits-Contains 2 or more
branches for electrons (current) to flow
through
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•
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Parallel circuits have an advantage because
you can use different items without affecting
the entire current
Houses make use of parallel circuits
parallel circuit
Safety Devices

There are two types of safety devices
most commonly used when using
electrical wiring in buildings and cars

These devices keep the wires from getting
hot and melting or possibly starting a fire
Safety Devices (cont)
1.
Fuse-A fuse is a small device that
breaks when the electricity becomes
more than the wires may be able to
handle
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
When the fuse breaks it opens the
electrical circuit so no more electricity can
flow through
Most commonly used in cars or individual
electric devices
Safety Devices (cont)
2.
Circuit breaker-When electric flow
becomes to much a piece of metal
bends and flips a switch that opens the
circuit
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
The advantage to having a circuit breaker
is that it can be reset (just reset the switch
and it bends the metal back into place)
A circuit breaker is generally used in
houses and large buildings