91. The characteristics equation of a closed loop control system is given as s2 + 4s + 16 = 0. The resonant frequency in radian/sec of the system is
92. What is the number of root-locus segments which do not terminate on zeros?
93. Consider the feedback system shown in the figure. The Nyquist plot of G(s) is also shown. Which one of the following conclusions is correct?
94. If the initial conditions for a system are inherently zero, what does it physically mean?
95. Which of the following statements with respect to the stability of a control system is true?
1. The roots of the characteristic equation are on the left half of the s-plane.
2. The system is bounded input bounded output (BIBO) stable.
3. Stability is independent of the input.
4. The roots of the characteristic equation are on the left half of the s-plane and on the imaginary axis.
1. The roots of the characteristic equation are on the left half of the s-plane.
2. The system is bounded input bounded output (BIBO) stable.
3. Stability is independent of the input.
4. The roots of the characteristic equation are on the left half of the s-plane and on the imaginary axis.
96. In the Bode diagram of $$H\left( s \right) = 1 + \frac{s}{{10}},$$ phase at ω = 10 is
97. A process is controlled by a PID controller. The sensor has high measurement noise. How can this effect be reduced?
98. In a servo-system, the device used for providing derivative feedback is known as:
99. The type of system shown in the bode plot here is:
100. In a feedback system, feedback factor of 0.1 is used with forward gain of 10. The sensitivity of the system with respect to the feedback element is
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