ISRO Scientist or Engineer Electronics 2020

Identify the Converter topologies from the figures given below:

Consider two control systems with following transfer function,
System 1 : $$G(s)=\frac{1}{3s + 1}$$

System 2 : $$G(s)=\frac{1}{s + 1}$$

Which of the following is true:

A systems open loop transfer function is given by $$G(s) = \frac{K}{s(s+2)(s+4)}$$. If the system is having a unity negative feedback which of the following is true for such system is stable ?

The Third peak overshoot and second undershootof the step response of the second order under damped system is given by

Consider the Nyquist plot of the second order underdamped system shown in the below figure

The Resonant Frequency corresponding to the Nyquist plot is

The unit step responseof a system with the transfer function $$G(s)=\frac{1-s}{1+s}$$ s given by which of the following? (A unit step function is represented by u(t))

The system $$\frac{1600}{s(s+1)(s+16)}$$ is to be compensated such that its gain-crossover frequency becomes same as its uncompensated Phase-crossover frequency. Which of the following is the phase crossover frequency of the compensated system?

A discrete-time, linear time invariant system with input sequence $$x_{n}$$, and output sequence $$Y_{n}$$ is characterised by
$$y_{n}=0.1x_{n}+0.9 y_{n-1}$$
If two such systems are connected in series, which of the following is the governing difference equation of the overall system?

The total number of feedbackloops of the signal flow graph is where R is input and C is output.

From the below given Nyquist plot,calculate the number open loop poles on the Right hand side of s-plane for the closed loop system to be Stable.