Consider the following statements:1. The delay time is the time required to reach 50% of the final value in the first time.2. The rise time is the time required for the response to rise from 10% to 90% of its final value for underdamped systems.3. The rise time is the time required for the response to rise from 0 to 100% for the underdamped systems.Which of these statements are correct?

2 and 3 only negative real axis

Circles of constant phase shift for the closed loop transfer function

Constant gain and constant phase shift loci of the closed-loop system.

Plot of loop gain with the variation in frequency

Circles of constant gain for the closed loop transfer function

Circles of constant phase shift for the closed loop transfer function

Assertion (A): All the systems which exhibit overshoot in transient response will also exhibit resonance peak in frequency response.Reason (R): Large resonance peak in frequency response corresponds to a large overshoot in transient response.

Both A and R are true and R is not the correct explanation of A

Both A and R are true and R is the correct explanation of A

Both A and R are true and R is not the correct explanation of A

Statement 1: In constant M circles, as M increases from 1 to 8 radius of circle increases from 0 to 8 and Centre shifts from (-1,0) to (-8,0)Statement 2: The circle intersects real axis at point (-1/2, 0)

Statement 1 is TRUE, 2 is FALSE

Statement 1 is FALSE, 2 is TRUE

OLTF contains one zero in right half of s-plane then

Close loop system is unstable for higher gain

Explore topic-wise MCQs in Control Systems.

This section includes 108 Mcqs, each offering curated multiple-choice questions to sharpen your Control Systems knowledge and support exam preparation. Choose a topic below to get started.

101.	Consider the following statements:1. The delay time is the time required to reach 50% of the final value in the first time.2. The rise time is the time required for the response to rise from 10% to 90% of its final value for underdamped systems.3. The rise time is the time required for the response to rise from 0 to 100% for the underdamped systems.Which of these statements are correct?
A.	1,2 and 3 only
B.	1 and 2 only
C.	1 and 3 only
D.	2 and 3 only negative real axis
Answer» D. 2 and 3 only negative real axis

Discussion

102.	Constant N-loci:
A.	Constant gain and constant phase shift loci of the closed-loop system.
B.	Plot of loop gain with the variation in frequency
C.	Circles of constant gain for the closed loop transfer function
D.	Circles of constant phase shift for the closed loop transfer function
Answer» D. Circles of constant phase shift for the closed loop transfer function

Discussion

103.	Given a unity feedback control system with G (s) = K/s(s+4), the value of K for which the damping ratio is 0.5.
A.	1
B.	16
C.	64
D.	32
Answer» C. 64

Discussion

104.	Assertion (A): All the systems which exhibit overshoot in transient response will also exhibit resonance peak in frequency response.Reason (R): Large resonance peak in frequency response corresponds to a large overshoot in transient response.
A.	Both A and R are true and R is the correct explanation of A
B.	Both A and R are true and R is not the correct explanation of A
C.	A is true but R is false
D.	A is false but R is true
Answer» B. Both A and R are true and R is not the correct explanation of A

Discussion

105.	The constant N loci represented by the equation x^2+x+y^2=0 is for the value of phase angle equal to:
A.	-45°
B.	0°
C.	45°
D.	90°
Answer» E.

Discussion

106.	Statement 1: In constant M circles, as M increases from 1 to 8 radius of circle increases from 0 to 8 and Centre shifts from (-1,0) to (-8,0)Statement 2: The circle intersects real axis at point (-1/2, 0)
A.	Statement 1 is TRUE, 2 is FALSE
B.	Statement 1 is FALSE, 2 is TRUE
C.	Statement 1 & 2 TRUE
D.	Statement 1 & 2 FALSE
Answer» E.

Discussion

107.	The transfer function of a system is given by Y(s)/X(s) = e−0.1s/1+s. If x(t) is 0.5sint, then the phase angle between the output and the input will be:
A.	-39.27°
B.	-45°
C.	-50.73°
D.	-90°
Answer» D. -90°

Discussion

108.	OLTF contains one zero in right half of s-plane then
A.	Open loop system is unstable
B.	Close loop system is unstable
C.	Close loop system is unstable for higher gain
D.	Close loop system is stable
Answer» D. Close loop system is stable

Discussion

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Explore topic-wise MCQs in Control Systems.

Constant N-loci:

Given a unity feedback control system with G (s) = K/s(s+4), the value of K for which the damping ratio is 0.5.

Assertion (A): All the systems which exhibit overshoot in transient response will also exhibit resonance peak in frequency response.Reason (R): Large resonance peak in frequency response corresponds to a large overshoot in transient response.

The constant N loci represented by the equation x^2+x+y^2=0 is for the value of phase angle equal to:

Statement 1: In constant M circles, as M increases from 1 to 8 radius of circle increases from 0 to 8 and Centre shifts from (-1,0) to (-8,0)Statement 2: The circle intersects real axis at point (-1/2, 0)

The transfer function of a system is given by Y(s)/X(s) = e−0.1s/1+s. If x(t) is 0.5sint, then the phase angle between the output and the input will be:

OLTF contains one zero in right half of s-plane then