Feedback
Written by Krishna Peri
Feedback is an integral part of circuits. Feedback occurs when the output of a system is routed back as a secondary input to the system. This way the overall output of the system depends on the previous outputs of the system. Feedback is creating a cause and effect chain where the output is both a cause and effect.
The Main Idea
Feedback is important in order to route the output of the loop back into the input, so that the overall output is affected by the previous outputs. In RC circuits, feedback allows current equalization and causes current to follow the wire. Feedback is a concept that you should know about circuits, however there are NO calculations that occur in regards to feedback. Feedback is not a major component of the circuits we use in Intro Physics, because it requires more complex circuits in order to be implemented. However, the concept is something you should be familiar with.
The basic model representing feedback is:
Feedback and Current Equalization
What are the mathematical equations that allow us to model this topic. For example [math]\displaystyle{ {\frac{d\vec{p}}{dt}}_{system} = \vec{F}_{net} }[/math] where p is the momentum of the system and F is the net force from the surroundings.
Feedback causes current to follow the wire
How do we visualize or predict using this topic. Consider embedding some vpython code here Teach hands-on with GlowScript
Examples
Feedback is not a concept that effects
Simple
Middling
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Connectedness
Feedback is important for Electrical Engineering and Computer Engineering majors, because it is an integral part of many circuit systems.
- Is there an interesting industrial application?
History
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See also
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