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Mastering Negative Feedback

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Questions and Answers

Which type of feedback occurs when a trend is positively reinforced, creating amplification?

Balancing feedback

Amplifying feedback

Positive feedback (correct)

Negative feedback

What is an example of negative feedback?

The fluctuations in the output of a system

The squealing feedback loop of a microphone and speaker

The runaway heating and ultimate meltdown of a nuclear reactor

The heating system thermostat turning off when the temperature gets high enough (correct)

Which type of feedback tends to lead to instability via exponential growth, oscillation or chaotic behavior?

Positive feedback (correct)

Negative feedback

Balancing feedback

Amplifying feedback

What does negative feedback do to the fluctuations in the output of a system?

<p>Reduces the fluctuations</p> Signup and view all the answers

What happens when the temperature gets too cold in a heating system with negative feedback?

<p>The heat is turned on</p> Signup and view all the answers

Study Notes

Feedback Mechanisms

Positive feedback strengthens the trend by reinforcing the original change, amplifying the effect and creating a rapid feedback loop.
Negative feedback reduces the initial change, pushing the system back towards stability.
Example of negative feedback: A thermostat in a heating system; when the temperature drops below the setpoint, the thermostat switches the heater on, restoring the desired temperature.
Positive feedback leads to instability, causing exponential growth, oscillation, or chaotic behavior.
Negative feedback dampens fluctuations in the output of a system by counteracting changes.
In a heating system with negative feedback, when the temperature falls below the setpoint, the thermostat triggers the heater. The heater increases the temperature, eventually reaching the setpoint. The thermostat then shuts off the heater, preventing further temperature rise and achieving stability.

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Description

Test your knowledge on negative feedback systems and their role in reducing fluctuations in output. Explore examples like heating system thermostats and understand how negative feedback works to maintain balance.