Question

Which is a feedback mechanism for a system?

Answer 1

The following is a feedback mechanism for a system :

The progress bar when downloading a file on iTunes

Explanation:

• A feedback mechanism is a loop system wherein the system responds to a perturbation. The response may be in the same direction (as in positive feedback) or in the opposite direction (as in negative feedback).
• Feedback occurs when outputs of a system are routed back as inputs as part of a chain of cause-and-effect that forms a circuit or loop. The system can then be said to feed back into itself.
• Evaluation feedback needs to be done “in the moment” to help the person receiving the feedback know where they stand.
• A feedback control system consists of five basic components: (1) input, (2) process being controlled, (3) output, (4) sensing elements, and (5) controller and actuating devices.
• Because negative feedback produces stable circuit responses, improves stability and increases the operating bandwidth of a given system, the majority of all control and feedback systems is degenerative reducing the effects of the gain.