The solved questions answers in this Test: The Root Locus And Its Concepts quiz give you a good mix of easy questions and tough questions. What is the number of the root locus segments which do not terminate on zeroes? Join our social networks below and stay updated with latest contests, videos, internships and jobs! Explanation: State space analysis is different from the transfer function approach as this can be used for the analysis of multiple input and multiple output system. 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In this chapter, let us discuss how to construct (draw) the root locus. The root locus is a graphical representation in s-domain and it is symmetrical about the real axis. In this chapter, let us discuss how to construct (draw) the root locus. For drawing root locus, the angle of asymptote yields the direction along which _____branches approach to infinity. b) The saturation voltage V CE for germanium transistor is more than silicon transistor. setting the gain K=51.2: >> z=0.4; >> sgrid(z,0); Use right click to select the damping: Figure 7. The addition of open loop poles pulls the root locus towards: Imaginary axis and system becomes marginally stable. Root Locus method is a widely used graphical technique to analyze how the system roots vary with variation in particular parametric quantity, generally a gain in a feedback control system. b) They start from the open loop poles and terminate at the open loop zeroes It would have 2 asymptotes It would not have any asymptotes ... Go To Download Page Close. View Answer, 10. Let the frequency corresponding to the point where the root locus of the system transits to unstable region be K.Now suppose we introduce a zero in the open loop transfer function at -3, while … -1 b. d) The left and therefore system becomes unstable - Published on 09 Oct 15 Which one of the following are correct? Electrical Engineering MCQ questions and answers especially for the Electrical Engineer and who preparing for GATE Exam. Applications of Root Locus 3. Root Locus method is a widely used graphical technique to analyze how the system roots vary with variation in particular parametric quantity, generally a gain in a feedback control system. If the gain of the open loop system is doubled, the gain of the system is : Multiple Choice Question (MCQ) of Electronics page-17:241. c) The difference between the number of poles and zeroes 0 c. 1 d. ∞ 6) Gas chromatography is used for measurement of a. temperature b. pressure c. concentration d. flow rate Through graphical methods of Root Locus, direct portrayal of the system performance can be obtained as a whole especially referring to the transient response. Answer: d Bode C. Nyquist D. Nichols. ... Go To Download Page Close. Root Locus - Electronic Engineering (MCQ) questions & answers Home >> Category >> Electronic Engineering (MCQ) questions & answers >> Root Locus 1) For a unity feedback system with G(s) = 10 / s 2 , what would be the value of centroid? Explanation: The system can become stable by reducing the damping and also by adding zeroes in the s plane and moving left of the s plane system becomes more stable. Figure 7 shows that we can get a damping ratio ξ=0.4. B The bandwidth of the system. c) -2 CONTROL SYSTEM IMPORTANT MCQs. When the initial conditions of a system are specified to be zero it implies that the system is (a) at rest without any energy stored in it (b) working normally with reference input (c) working normally with zero … As the input of the system is changed . A. 5) and the symmetry of the root locus. Bode Plots (Bode Magnitude and Phase Plots) - Topi... 2015 (34) September (3) June (13) nyquist question-ppg_unit-3-mcqs questions-ppg-unit-3-root-locus unit-3 unit-4 c) Shape of the root locus gives idea of type of controller needed to meet design specification d) Root locus can be used to handle more than one variable at a time Answer: d Explanation: For more than one variable state space is used. Sanfoundry Global Education & Learning Series – Control Systems. a) Root loci can be used for analyzing stability and transient performance b) Root loci provide insight into system stability and performance If … 0 c. 1 d. ∞ 6) Gas chromatography is used for measurement of a. temperature b. pressure c. concentration d. flow rate Topics covered are 1. Explanation: Root locus and Complementary root locus are complementary to each other. Location in the RL of ξ=0.4. For example if we had a characteristic equation of 1 + K s+ 2 s(s+ 4) = 0 Answer: b These short objective type questions with answers are very important for Board exams as well as competitive exams. 37. 1. Figure 8 shows the Step Response of the closed-loop system for K p =51.2 and ξ=0.4, and the values of the main parameters: Consider the following statements regarding root loci: All root loci start from the respective poles of G(s) H(s), All root loci end at the respective zeros of G(s) H(s) or go to infinity, The root loci are symmetrical about the imaginary axis of the s-plane, All root loci start and end from the respective poles of G(s) H(s) or go to infinity. A. The main objective of drawing root locus plot is : To obtain a clear picture about the open loop poles and zeroes of the system, To obtain a clear picture about the transient response of feedback system for various values of open loop gain K, To determine sufficient condition for the value of ‘K’ that will make the feedback system unstable. At respective poles and zeros from G ( s ) equating the denominator of transfer function for a a.! 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