Electronics and Communication Engineering - Automatic Control Systems

1. 

Assertion (A): If points at infinity are included, G(s) has same number of poles and zeros.

Reason (R): The function has a zero at s = - 2.

A. Both A and R are correct and R is correct explanation of A
B. Both A and R are correct but R is not correct explanation of A
C. A is correct but R is wrong
D. R is correct but A is wrong

Answer: Option B

Explanation:

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2. 

If the characteristic equation is (λ + 1) (λ + 2) (λ + 3) = 0, the eigen values are

A. -1, -2, -3
B. 1, 2, 3
C. 0, 1, 2
D. 0, 2, 3

Answer: Option A

Explanation:

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3. 

Lag compensation permits a high gain at low frequencies.

A. True
B. False

Answer: Option A

Explanation:

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4. 

If the poles lie in second quadrant, damping ratio is

A. 1
B. less than 1
C. zero
D. more than 1

Answer: Option B

Explanation:

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5. 

Assertion (A): When performance specifications are given in term of transient response characteristics, root locus method is a suitable method.

Reason (R): When performance specifications in terms of state variables are given, modern control methods can be used.

A. Both A and R are correct and R is correct explanation of A
B. Both A and R are correct but R is not correct explanation of A
C. A is correct but R is wrong
D. R is correct but A is wrong

Answer: Option B

Explanation:

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