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An open loop system has no feedback to control what is being "done" by the system or device. In a hair dryer the work being done is to dry something, typically your hair. However, the hair dryer has no way of knowing how "dry" your hair is getting and adjusting the speed or heat to dry faster or slower. It is the person at the controls that makes this judgment and not the device. However in a hair dryer there may be a heat sensor that turns off the heating element so it doesn't get too hot. This is a feedback system within the dryer, but has nothing to do with how dry your hair is getting.

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βˆ™ 2010-06-21 12:30:50
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Q: How does a hair dryer work as an open loop system?
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