Q11. The expression of settling time in second order system is

Q12. For verifying the closed loop stability, which technique is used?

Q13. Lead compensator is used to improve _________

Q14. The effect of adding poles and zeros can be determined quickly by

Q15. Steady state error in the control system is the difference of input and output at \(t =\) _______

Q16. When the gain margin is positive and the phase margin is negative, the system is

Q17. Which of the following methods is most strong tool to determine the stability and transient response of the system?

Q18. If any root of the characteristic equation has a positive real part then the system is

Q19. A system described by the transfer function \(G(s) = \frac{1}{(s^3+\alpha s^2+\beta s+3)}\) is stable. The constraints on '\(\alpha\:\)' and '\(\beta\:\)' are

Q20. Let \(\dot{x} = \begin{bmatrix}1 & 2 \\ 0 & 1 \end{bmatrix} x + \begin{bmatrix} 0 \\ 1 \end{bmatrix} u \quad\) and \(\quad y=\begin{bmatrix} b & 0 \end{bmatrix}\: x\)
Where b is an unknown constant. This system is