In root locus plot, a point on the real axis lies on the locus, if the number of open loop poles plus zeros on real axis to the

a) left of the point is odd b) left of the point is even .

c) right of the pointis odd d) right of the point is even

1 Answer

Answer :

In root locus plot, a point on the real axis lies on the locus, if the number of open loop poles plus zeros on real axis to the right of the pointis odd

Related questions

Description : After drawing the Root-Locus, the closed-loop poles corresponding to a specified value of gain K can be determined from which of the following criterion ? (A) Magnitude criterion alone (B) Angle criterion alone (C) Both Magnitude and Angle criteria (D) Angle of departure and angle of arrival.

Last Answer : After drawing the Root-Locus, the closed-loop poles corresponding to a specified value of gain K can be determined from which of the following criterion ? (A) Magnitude criterion alone (B) Angle ... (C) Both Magnitude and Angle criteria (D) Angle of departure and angle of arrival.

Description : Whether a given point in the S-plane lies on the Root Locus of a system can be determined by (A) Magnitude criterion (B) Angle Criterion (C) Both Magnitude and Angle Criteria (D) Break-in and Break-away Criteria

Last Answer : Whether a given point in the S-plane lies on the Root Locus of a system can be determined by Angle Criterion

Description : A system has 14 poles and 2 zeros in its open -loop transfer function. The slope of its highest frequency asymptote in its magnitude plot is (a) - 40 dB/dec (b) - 240 dB/dec (c) + 40 dB/dec (d) + 240 dB/dec

Last Answer : A system has 14 poles and 2 zeros in its open -loop transfer function. The slope of its highest frequency asymptote in its magnitude plot is (a) - 40 dB/dec (b) - 240 dB/dec (c) + 40 dB/dec (d) + 240 dB/dec

Description : How will you find root locus on real axis.

Last Answer : To find the root locus on real axis, choose a test point on real axis. If the total number of poles and zeros on the real axis to the right of this rest point is odd number then the rest point lies on the root locus. If it is even then the test point does not lie on the root locus.

Description : The critical point lies within the nyquist plot then the system is   (a) Marginally stable (b) Unstable (c) Stable (d) Undetermined  

Last Answer : The critical point lies within the nyquist plot then the system is Unstable 

Description : How to find the crossing point of root locus in imaginary axis.

Last Answer : Method (i) by Routh Hurwitz criterion Method (ii) by letting s=jw in the characteristics equation.

Description : lf the poles of system are lying on the imaginary axis in s-plane, then the system will be

Last Answer : lf the poles of system are lying on the imaginary axis in s-plane, then the system will be marginally stable

Description : Poles are real and negative and equal then the system is _____ damped system   (a) Undamped (b) Underdamped (c) Critically damped (d) Overdamped

Last Answer : Poles are real and negative and equal then the system is Critically damped damped system 

Description : The normal at a point `P` on the ellipse `x^2+4y^2=16` meets the x-axis at `Qdot` If `M` is the midpoint of the line segment `P Q ,` then the locus of

Last Answer : The normal at a point `P` on the ellipse `x^2+4y^2=16` meets the x-axis at `Qdot` If `M` is ... (pm2sqrt3,pmsqrt1/7)` D. `(pm2sqrt3,pm(4sqrt(3))/4)`

Description : What will happen to the gain margin if the gain of the open loop system is doubled? A) Doubled B) Becomes half C) Is not affected D) Becomes one-fourth 

Last Answer : What will happen to the gain margin if the gain of the open loop system is doubled? A) Doubled B) Becomes half C) Is not affected D) Becomes one-fourth 

Description : The open loop control system is one in which _____.

Last Answer : the output is independent of output

Description : Order of the open loop transfer function is _____ to order of closed loop transfer function   (a) not equal (b) equal (c) less than (d) greater than 

Last Answer : Order of the open loop transfer function is equal to order of closed loop transfer function 

Description : If the gain of the open loop system is doubled, the gain margin  (1) Is not affected (2) Gets doubled (3) Becomes half (4) Becomes one -forth

Last Answer : If the gain of the open loop system is doubled, the gain margin Becomes half

Description : _____is an open loop control system.

Last Answer : Field controlled D.C. motor is an open loop control system.

Description : In open loop system

Last Answer : In open loop system the control action is independent of the output.

Last Answer : In an open loop control system Output is independent of control input.

Description : What is an example of an open loop system?

Last Answer : Open loop system. Ex. Electric heater, washing machine, fan, electric switch, etc

Description : What are the advantages of open loop control system?

Last Answer : Open loop control system are simple to design. Open loop control system are generally stable.

Description : what is open loop and close loop control system?

Last Answer : A) In open loop system the input is independent         of output but output is depends on input. A-1. no feedback path in open loop s/m    -2. less accuracy than close loop s/m. Ex. Washing ...    -3. high accuracy. Ex. Air conditioner ( AC ), rocket launcher, radar          system, etc

Description : The driving point impedance with poles at ω = 0(zero) and ω = ∞ (infinity) must have the  (a) s term in the denominator and an excess term in the numerator (b) s term in the ... the numerator and denominator (d) s term in the denominator and equal number of terms in the numerator and denominator

Last Answer : The driving point impedance with poles at ω = 0(zero) and ω = ∞ (infinity) must have the s term in the denominator and an excess term in the numerator

Description : In a purely cohesive soil, the critical centre lies at the intersection of (A) Perpendicular bisector of slope and the locus of the centre (B) Perpendicular drawn at 1/3rd slope from toe and the ... C) Perpendicular drawn at 2/3rd slope from toe and the locus of the centre (D) Directional angles

Last Answer : Answer: Option D

Description : The locus of the moment of inertia about inclined axes to the principal axis, is  (A) Straight line  (B) Parabola  (C) Circle  (D) Ellipse

Last Answer : (D) Ellipse

Description : What is the time response of a system whose poles lie on the right hand side of s-plane? A) Exponentially increasing B) Exponentially decreasing C) Sinusoidal oscillations D) Step response 

Last Answer : What is the time response of a system whose poles lie on the right hand side of s-plane? A) Exponentially increasing B) Exponentially decreasing C) Sinusoidal oscillations D) Step response 

Description : Which one of the following applications software’s is used to obtain an accurate root locus for? a) LISP b) MATLAB c) dBase d) Oracle Ans: B 6.Lenz devised a rule to find out direction of a)current induced in a circuit b)electromagneticdifference c)potential difference d)flow of power in fuse

Last Answer : Ans: A

Description : What are the main significances of root locus?

Last Answer : i. The main root locus technique is used for stability analysis. ii. Using root locus technique the range of values of K, for as table system can be determined

Description : A unity negative feedback control system is found to have a gain margin of 20 dB. The Nyquist plot of the system (A) crosses the real axis at +0.1 (B) crosses the real axis at -0.1. (C) crosses the imaginary axis at -0.1 (D) crosses the imaginary axis at +0.1

Last Answer : A unity negative feedback control system is found to have a gain margin of 20 dB. The Nyquist plot of the system crosses the real axis at -0.1.

Description : The unit circle of the Nyquist plot transforms into unity or 0 dB line of the amplitude plot of the Bode diagram for

Last Answer : The unit circle of the Nyquist plot transforms into unity or 0 dB line of the amplitude plot of the Bode diagram for all frequencies

Description : In a Bode magnitude plot, which one of the following slopes would be exhibited at high frequencies by a 4th order all-pole system? (A) – 80 dB/decade (B) – 40 dB/decade (C) +40 dB/decade (D) +80 dB/decade

Last Answer : In a Bode magnitude plot, which one of the following slopes would be exhibited at high frequencies by a 4th order all-pole system? (A) – 80 dB/decade (B) – 40 dB/decade (C) +40 dB/decade (D) +80 dB/decade

Description : In the Bode plot of a unity feedback control system, the value of phase of G(jw) at the gain cross -over frequency is - 125°.. The phase margin of the system is (a) - 125° (b) - 55° (c) 55° (d) 125°

Last Answer : In the Bode plot of a unity feedback control system, the value of phase of G(jw) at the gain cross -over frequency is - 125°.. The phase margin of the system is 55°

Description : By adding a pole at the origin of s -plane, the Nyquist plot of a system will rotate by (a) 90° in anti -clockwise direction (b) 90° in clockwise direction (c) 180° in anti -clockwise direction (d) 180° in clockwise direction

Last Answer : By adding a pole at the origin of s -plane, the Nyquist plot of a system will rotate by 90° in clockwise direction

Description : The characteristic equation for a closed loop system with forward gain K is s4 + 4s3 + 8s2 + 6s + K = 0. The critical gain value Kc for stability should not exceed  (a) 3.25 (b) 9.75 (c) 13.0 (d) 23.3

Last Answer : The characteristic equation for a closed loop system with forward gain K is s4 + 4s3 + 8s2 + 6s + K = 0. The critical gain value Kc for stability should not exceed  (a) 3.25 (b) 9.75 (c) 13.0 (d) 23.3

Description : The loop transfer of a system is G(s) H(s) = 5/(s+1) (2s+1)(3s+1) which has the phase crossover frequency fc = 0.16 Hz. The gain margin (dB) of the system is  (a) 6 (b) 4 (c) 2 (d) 0

Last Answer : The loop transfer of a system is G(s) H(s) = 5/(s+1) (2s+1)(3s+1) which has the phase crossover frequency fc = 0.16 Hz. The gain margin (dB) of the system is 6

Description : Negative feedback in a closed-loop control system DOES NOT (A) reduce the overall gain (B) reduce bandwidth (C) improve disturbance rejection (D) reduce sensitivity to parameter variation

Last Answer : Negative feedback in a closed-loop control system DOES NOT reduce bandwidth

Description : In a closed loop control system  (a) control action depends upon the output and also on the input command (b) output signal is fed back to be compared with the reference signal (c) the accuracy is better than in the open loop system (d) all of the above

Last Answer : In a closed loop control system control action depends upon the output and also on the input command , output signal is fed back to be compared with the reference signal , the accuracy is better than in the open loop system. 

Last Answer : In a closed-loop system in which the output is the speed of a motor, the output rate control can be used to limit the acceleration of the motor.

Description : _____is a closed loop system.

Last Answer : Auto-pilot for an aircraft is a closed loop system.

Description : An automatic toaster is a ______ loop control system.

Last Answer : An automatic toaster is an open loop control system.

Description : In closed loop control system, with positive value of feedback gain the overall gain of the system will

Last Answer : In closed loop control system, with positive value of feedback gain the overall gain of the system will decrease.

Description : What are some examples of a closed loop system?

Last Answer : C.L s/m. EX. Air conditioner (AC), rocket launcher, radar system, voltage stabilizer etc.

Description : What is Zero's real name and why is it significant in the book Holes?

Last Answer : ttt

Description : The magnetic field due to a current carrying circular loop of radius 3 cm at a point on the axis at a distance of 4cm from the centre is `54muT`. What

Last Answer : The magnetic field due to a current carrying circular loop of radius 3 cm at a point on the axis at a distance of ... T` C. `125 mu T` D. `75 mu T`

Description : If the perpendicular distance of a point P from the X-axis is 5 units and the foot of the perpendicular lies on the negative direction of X-axis, then the point P has -Maths 9th

Last Answer : (d) We know that, the perpendicular distance of a point from the X-axis gives y-coordinate of that point. Here, foot of perpendicular lies on the negative direction of X-axis, so perpendicular distance can be measure in II quadrant or III quadrant. Hence, the point P has y-coordinate = 5 or -5.

Description : The point whose ordinate is 4 and which lies on K-axis is -Maths 9th

Last Answer : (b) Given ordinate of the point is 4 arid the point lies on Y-axis, so its abscissa is zero. Hence, the required point is (0, 4).

Description : The point which lies on Y-axis at a distance of 5 units in the negative direction of Y-axis is -Maths 9th

Last Answer : (C) Given the point lies on X-axis this shows that its ^-coordinate is zero. Also, it is at a distance of 5 units in negative direction of X-axis, so its y-coordinate” is negative.Hence, the required point is (0, – 5).

Description : A point lies on positive direction of X-axis at a distance of 7 units from the Y-axis. What are its coordinates ? -Maths 9th

Last Answer : Given, point lies on the positive direction of X-axis, so its y-coordinate will be zero and it is at a distance of 7 units from the X-axis, so its coordinates are (7, 0). If it lies on negative ... x-coordinate will be zero and its distance from X-axis is 7 units, so its coordinates are (0, -7).

Description : If the perpendicular distance of a point P from the X-axis is 5 units and the foot of the perpendicular lies on the negative direction of X-axis, then the point P has -Maths 9th

Last Answer : (d) We know that, the perpendicular distance of a point from the X-axis gives y-coordinate of that point. Here, foot of perpendicular lies on the negative direction of X-axis, so perpendicular distance can be measure in II quadrant or III quadrant. Hence, the point P has y-coordinate = 5 or -5.

Description : The point whose ordinate is 4 and which lies on K-axis is -Maths 9th

Last Answer : (b) Given ordinate of the point is 4 arid the point lies on Y-axis, so its abscissa is zero. Hence, the required point is (0, 4).

Description : The point which lies on Y-axis at a distance of 5 units in the negative direction of Y-axis is -Maths 9th

Last Answer : (C) Given the point lies on X-axis this shows that its ^-coordinate is zero. Also, it is at a distance of 5 units in negative direction of X-axis, so its y-coordinate” is negative.Hence, the required point is (0, – 5).

Description : A point lies on positive direction of X-axis at a distance of 7 units from the Y-axis. What are its coordinates ? -Maths 9th

Last Answer : Given, point lies on the positive direction of X-axis, so its y-coordinate will be zero and it is at a distance of 7 units from the X-axis, so its coordinates are (7, 0). If it lies on negative ... x-coordinate will be zero and its distance from X-axis is 7 units, so its coordinates are (0, -7).

Description : Find the point whose ordinate is –3 and which lies on y-axis. -Maths 9th

Last Answer : Solution :- (0,-3)