Polar plot cuts negative real axis at 0.4 unit then find gain margin in dB ?

What is the relation between output response and input signal in closed loop system?

Which of the following is not a feature of a good control system?

In a car moving at a constant speed of 50 km/h, which of the following is the feedback element for the driver?

A system having input x and output y is represented by the differential equation:

(dy/dt) + 3y = (dx/dt) + 2x. Find the transfer function of the system.

The polar plot of the system is given as shown,

If we add poles to the system and draw a new plot, which option corresponds to the maximum number of poles added?

How is the transient response of a system affected?

 The input signals to control systems are not known fully ahead of time, the characteristics of control system which suddenly strain a control system are:

The response of an LCR circuit to a step input is over-damped if and only if the transfer function has-

A signal-flow graph is a