QUESTION 2 The critical value of gain for a system is 40 and gain margin is...
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QUESTION 2 The critical value of gain for a system is 40 and gain margin is 6dB. The system is operating at a gain of: a. 40 b. 120 c. 80 d. 20 QUESTION 3 If the gain of the open loop system is doubled, the gain of the system is : a. Halved b. Doubled c. Not affected d. One fourth of the original value QUESTION 4 The phase margin of a stable system is always a. negative b. 180 degrees c. 0 degrees d. positive QUESTION 5 When the number of poles is equal to the number of zeroes, how many branches of root locus tends towards infinity? a. 2 b. 1 c.0 d. Equal to number of zeros QUESTION 6 If the gain of the system is reduced to a zero value, the roots of the system in the s-plane. Coincide with zero a. Hint (occur at the same time - coincide) b. Move away from zero c. Move away from poles Coincide with the poles QUESTION 7 if root loci plots of a particular control system do not intersect the imaginary axis at any point, then the gain margin of the system will be a. Infinite b. 1 C. 0.707 d.0 QUESTION 8 Which one of the following is not the property of root loci? a. They start from the open loop poles and terminate at the open loop zeroes b. The root locus is symmetrical about imaginary axis c. Segments of the real axis are the part of the root locus if and only is the total number of real poles and zeroes to their right is odd. d. The breakaway points are determined from dk/ds-0 QUESTION 2 The critical value of gain for a system is 40 and gain margin is 6dB. The system is operating at a gain of: a. 40 b. 120 c. 80 d. 20 QUESTION 3 If the gain of the open loop system is doubled, the gain of the system is : a. Halved b. Doubled c. Not affected d. One fourth of the original value QUESTION 4 The phase margin of a stable system is always a. negative b. 180 degrees c. 0 degrees d. positive QUESTION 5 When the number of poles is equal to the number of zeroes, how many branches of root locus tends towards infinity? a. 2 b. 1 c.0 d. Equal to number of zeros QUESTION 6 If the gain of the system is reduced to a zero value, the roots of the system in the s-plane. Coincide with zero a. Hint (occur at the same time - coincide) b. Move away from zero c. Move away from poles Coincide with the poles QUESTION 7 if root loci plots of a particular control system do not intersect the imaginary axis at any point, then the gain margin of the system will be a. Infinite b. 1 C. 0.707 d.0 QUESTION 8 Which one of the following is not the property of root loci? a. They start from the open loop poles and terminate at the open loop zeroes b. The root locus is symmetrical about imaginary axis c. Segments of the real axis are the part of the root locus if and only is the total number of real poles and zeroes to their right is odd. d. The breakaway points are determined from dk/ds-0
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Question 2 Given Critical Gain 40 Gain Margin 6dB Let the operating gain be G Then use the relation ... View the full answer
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