Test: Feedback And Non Feedback Systems - Electrical Engineering (EE) MCQ

Explanation: It is feedback system as the temperature of our body is regulated periodically and being warm blooded we regulate our body temperature w.r.t. to the climate.

Explanation: Closed loop system is the system with the feedback and this can be positive or negative feedback and having feedback have less dependence on parameter variation.

Explanation: It cannot always increase gain it can also reduce the gain as gain of Open loop control system is more as compared to it.

Explanation: Sensitivity is defined as the change in output with respect to change in parameter or input and for a good control system the sensitivity must be less and in closed loop control system it gets reduced by the factor of 1/(1+GH).

Explanation: Feedback control system can be positive and negative but positive feedback systems less widely used as the positive feedback systems are more sensitive to parameter variations but negative feedback are less sensitive to change in G than change in H.

Explanation: Negative feedback increases stability but not positive positive feedback reduces the stability and for this reason negative feedback systems are used .

Explanation: As transient response of the system is improved by the use of feedback and it causes the settling time to reduce and closed loop system has higher bandwidth than open loop systems and this implies increase in speed of response.

Explanation: Feedback has many advantages as it can reduces the effects of noise and disturbance on system performance by increasing speed of response.

Explanation: As in feedback system output can be obtained for more than one input as output can be generated for both the reference input and also for the disturbance input.

Explanation: Feedback can either make a system stable if not stable previously or may be it can cause instability as it reduces the gain of the system and hence the system can become stable if unstable or vice versa.