back system would occur if there are two components and they have (it may be use

Question

back system would occur if there are two components and they have (it may be useful to sketch a diagram to help you answer) 8. A negative feed A) one coupling and it is negative B) two couplings and they are both positive C) two couplings and they are both negative D) two couplings and one is positive and one is negative 9. An equilibrium state is stable when a perturbation is A) amplified by negative feedback B) amplified by positive feedback C) dampened by negative feedback D) dampened by positive feedback

Explanation / Answer

8) D. two couplings and one is positive and one is negative.

Note: One negative coupling and one positive make up a negative feedback system.

       Both negative or both positive couplings make up a positive feedback system.

9) C.dampened by negative feedback.

Note: If the perturbation is amplified, the equilibrium state becomes unstable.

If the perturbation is dampened by negative feedback, the equilibrium state becomes stable.

If the perturbation is dampened by positive feedback, the equilibrium state becomes unstable.

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