As a result of introduction of negative feedback which of the following will not decrease ?
(A) Band width
(B) Overall gain
(C) Distortion
(D) Instability
The band width, in a feedback amplifier_______________?
(A) remains unaffected
(B) decreases by the same amount as the gain increase
(C) increases by the sane saaaajajt as the gain decrease
(D) decreases by the same amount as the gain decrease
In an automatic control system which of the following elements is not used ?
(A) Error detector
(B) Final control element
(C) Sensor
(D) Oscillator
Due to which of the following reasons excessive bond width in control systems should be avoided ?
(A) It leads to slow speed of response
(B) It leads to low relative stability
(C) Noise is proportional to band width
(D) None of the above
In a control system the output of the controller is given to_____________?
(A) final control element
(B) amplifier
(C) comparator
(D) sensor F. none of the above
In a stable control system backlash can cause which of the following ?
(A) Underdamping
(B) Overdamping
(C) Poor stability at reduced values of open loop gain
(D) Low-level oscillations
A controller, essentially, is a________________?
(A) sensor
(B) clipper
(C) comparator
(D) amplifier
Which of the following statements is correct for any closed loop system ?
(A) All the co-efficients can have zero value
(B) All the co-efficients are always non-zero
(C) Only one of the static error co-efficients has a finite non-zero value
(D) None of the above
The transient response, with feedback system_____________?
(A) rises slowly
(B) rises quickly
(C) decays slowly
(D) decays quickly
Which of the following statements is correct for a system with gain margin close to unity or a phase margin close to zero ?
(A) The system is relatively stable
(B) The system is highly stable
(C) The system is highly oscillatory
(D) None of the above