Root Locus - Control System Multiple Choice Questions and Answers
46. The root locus is the part of roots of the characteristic equation traced out in the S plane. Which one of the following is correct ?
A. As the input of the system is changed
B. As the output of the system is changed
C. As a system parameter is changed
D. As the sensitivity is changed
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C. As a system parameter is changed
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47. A control system has G ( s ) H ( s ) = K / [ s ( s + 4 ) ( s2 + 4s + 20 ) ( 0 < K )< ∞ ) What is the number of breakaway points in the root locus diagram ?
A. One
B. Two
C. Three
D. Zero
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48. For root loci which of the following are the starting points?
A. Open loop zeros
B. Closed loop zeros
C. Closed loop poles
D. Open loop poles
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49. At which of the following root loci will end ?
A. Open loop zeros
B. Closed loop zeros
C. Closed loop poles
D. Open loop poles
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50. The root loci of a system has three asymptotes. The system can have
A. Five poles and two zeros
B. For pole and one zero
C. Three poles
D. All of the above
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