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Negative feed back, is where some of the output is fed back to the input, in reverse phase. This limits the output, to protect the circuit and improve stability and fidelity.
Positive feedback is when some of the output signal is fed back to the input in phase. This generally causes the circuit to run away into oscillation. The popular use is to turn a simple amplifier into an oscillator, for use in radio circuits and timing.
It is also an unpleasant symptom of a badly set up Public address system, when the microphone hears the output from the speakers, which is then reinforced and you get unwanted oscillation, known as 'Howl round'.
What else can I help you with?
Is blood pressure negative or positive feedback?
Is the clotting of blood an example of positive or negative feedback?
Definition of negative feedback and positive feedback?
A: Any feedback that contributes to the input is positive feedback any feedback that subtract from the input is negative feedback
Is contractions during childbirth positive or negative feedback?
Positive feedback.
Feedback is when the body reacts in the same direction as a stimulus. Negative Positive?
Feedback can be both negative and positive. Negative feedback occurs when the body's response counteracts the stimulus, helping to maintain homeostasis. Positive feedback amplifies the stimulus, leading to a larger response.
Describing what is feedback system and differentiating between positive and negative feedback?
when a woman's contractions speed up during labor is negative or positive feedback
What are the two types of feedback mechanisms?
they are positive feedback and increase activity negative feedback.
What are the example of negative and positive feedback in geography?
A negative feedback would be if the planet heats up, the glaciers will melt, lowering the albedo effect of the snow, and in turn causing the planet to heat up more That is positive feedback, not negative. Positive feedback enhances the initial stimulus, negative feedback reverses the initial stimulus. The planet starts by heating up, then heats up even more, which is positive feedback.
Is the thirst sensation when you get dehydrated an example of a negative or a positive feedback?
negative
Explain would the formation of a goiter be positive or negative feedback?
Negative.
What are the feedback mechanisms that regulate hormone levels in the body?
Positive and negative feedback
What are the two feedbacks of Mechanisms?
they are positive feedback and increase activity negative feedback.
Is blood calcium level a positive or negative feedback mechanism?
positive
