- Introduction
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- Task
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Parallel Circuits
To begin, watch the video Parallel Circuits (4:37). Login instructions.
A parallel circuit contains two or more paths for current to flow through.
- The voltage is the same across each component.
- The total current is the sum of the current in each path.
- Parts of a device in parallel can be turned on or off separately.
In a parallel circuit, the current can run through all branches that are connected together. Using Ohm's law, we know that the current is greater through the branches that have lower resistance.
Uses of Parallel Circuits
Most things that require electricity are wired in parallel circuits. For example, houses are wired in parallel. Just imagine if your home was wired in series circuits:
- All the lights in the house would have to be on at the same time.
- If you turned one off, all the lights would turn off!
A short circuit diagram.
Parallel Circuit Diagrams
You will need to be familiar with the following circuit symbols and diagrams to complete tasks in the next few lessons of this unit.
Circuit Symbols
These are the same circuit symbols included in the last lesson. Review them again if you need a refresher.
Parallel Circuit Diagrams
Read Parallel Circuits on the Physics Classroom and complete the following:
- Check Your Understanding Questions
- Practice Questions
