The maximum shift which can be provided by a lead compensator with transfer function is-A-15°B-30°C-45°D-60°-B-30°

Question

The maximum shift which can be provided by a lead compensator with transfer function  is-A-15&deg;B-30&deg;C-45&deg;D-60&deg;-B-30&deg;

APTITUDE CRACK · Accepted Answer

B 30&deg;  The maximum phase lead is given by In this case a = 1/3. Hence sin Φm = = 0.5 or Φm = 30&#176;.

Automatic Control Systems - Engineering