Bissoy.com
Doctors Medicines MCQs Q&A

When gain K of the open-loop transfer function of order greater than unity is varied from zero to infinity, the closed-loop system

When gain K of the open-loop transfer function of order greater than unity is varied from zero to infinity, the closed-loop system Correct Answer may become unstable

  • The closed loop system is said to be stable when all the closed loop poles lies on the left side.
  • When the gain K of the open loop transfer function is varied from zero infinity, the closed loop poles may cross the jω axis and go right half of the s-plane for certain values of K and the system becomes unstable.
  • The location of poles of a given transfer function for different values of K can be observed by plotting root locus diagram.

Related Questions

Given below are four statements- (p) The second principal focus of a lens is the position of the object, real or virtual whose image is at infinity. (q) The second principal focus of a lens is the position of the image, real or virtual whose object is at infinity. (r) The first principal focus of a lens is the position of the object, real or virtual whose image is at infinity. (s) The first principal focus of a lens is the position of the image, real or virtual whose object is at infinity.  Examine the above statements and find which among then are correct. 
The uniform distribution can range from -infinity to 0 or 0 to Infinity but not from -infinity to infinity.
There are six friends who have different height and they stand according to their height information as given below. Q is greater than P and S. M is greater than P. T is greater than P who is greater than O. M is greater than Q. T is smaller than Q. Who among the following is the smallest in height?
The boundary conditions in case of transient heat conduction in infinite thick solids are (i) t (x = 0) = t i (ii) t (0, T) = t a for T greater than zero (iii) t (infinity, T) = t i for T greater than zero Identify the correct statements
Two statements and a few problems are given. Which of the following problems can be solved through these statements? Statement I: X is greater than 500. Statement II: Y is greater than 400. Problem 1: Is X – Y greater than zero? Problem 2: Is Y – X less than zero? Problem 3: What is the sum of X and Y?
Consider the following statements related to stability of the control system : 1. Poles in right half-plane (rhp) yield pure exponential decaying natural response. 2. If poles of multiplicity greater than one are present on the imaginary axis, then the system is marginally stable, 3. If one pole is present in right-half plane, the system is unstable. 4. A system is stable if the natural response approaches zero as time approaches  infinity. Which of the above statements is/are not correct ?  
The sum to infinity of a geometric progression is 39/2. The sum to infinity to squares of the terms of the geometric progression is 253.5. What is the sum to infinity of cubes of the terms of the geometric progression?
What is/are true about ridge regression?
1. When lambda is 0, model works like linear regression model
2. When lambda is 0, model doesn't work like linear regression model
3. When lambda goes to infinity, we get very, very small coefficients approaching
04. When lambda goes to infinity, we get very, very large coefficients approaching infinity.
The symbols @, ©, #, $ and ⋆ are used with the following meaning illustrated. X @ Y → X is not greater than Y, X © Y → X is neither smaller than nor equal to Y, X # Y → X is neither greater than nor smaller than Y, X $ Y → X is not smaller than Y, X * Y → X is neither equal to nor greater than Y. Statements: A # B $ C * D, C * E $ F, D * F, E @ J Conclusion: I. J © C II. F * J
Two non-inverting amplifiers, with gain =1 and gain=20 are made using identical operational amplifiers. As compared to the unity gain amplifier, the amplifier with gain=20 has ___________