Assertion (A): A linear, negative feedback control system is invariable stable if its open loop configuration is stable

Reason (R): the negative feedback reduces the overall gain of the feedback.

a)Both A and R are true and R is correct explanation of A

b)Both A and R are true and R is not correct Explanation of A

The given characteristic equation s4+s3+2s2+2s+3=0 has:

b)One root in the RHS of s-plane

c)Two root in the RHS of s-plane

d)Three root in the RHS of s-plane

First column elements of the Routh’s tabulation are 3, 5, -3/4, ½, 2. It means that there are:

a)Is one root in the left half of s-plane

b)Are two roots in the left half of s-plane

c)Are two roots in the right half of the s-plane

d)Is one root in the right half of s-plane

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1.	Assertion (A): A linear, negative feedback control system is invariable stable if its open loop configuration is stable
A.	Reason (R): the negative feedback reduces the overall gain of the feedback.
B.	a)Both A and R are true and R is correct explanation of A
C.	b)Both A and R are true and R is not correct Explanation of A
D.	c)A is True and R is false
E.	d)A is False and R is true
Answer» E. d)A is False and R is true

Discussion

2.	The given characteristic equation s4+s3+2s2+2s+3=0 has:
A.	a)Zero root in the s-plane
B.	b)One root in the RHS of s-plane
C.	c)Two root in the RHS of s-plane
D.	d)Three root in the RHS of s-plane
Answer» D. d)Three root in the RHS of s-plane

Discussion

3.	First column elements of the Routh’s tabulation are 3, 5, -3/4, ½, 2. It means that there are:
A.	a)Is one root in the left half of s-plane
B.	b)Are two roots in the left half of s-plane
C.	c)Are two roots in the right half of the s-plane
D.	d)Is one root in the right half of s-plane
Answer» D. d)Is one root in the right half of s-plane

Discussion