Frequency Domain Analysis – Exercise – 1

6. For the transfer function

Mcq series

the phase cross-over frequency is :

(a)  0.5 rad/sec
(b)  1.732 rad/sec
(c)  0.707 rad/sec
(d)  2 rad/sec

Answer
Answer : (b)
Explanation
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7. A constant N-circle having centre at (- 1/2 + j0) in the G-plane, represents the phase angle equal to :

(a) 180°
(b) 90°
(c) 45°
(d) 

Answer
Answer : (b)
Explanation
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8. Octave frequency range is given by :

(a) ω1/ω2 = 2
(b) ω1/ω2 = 4
(c) ω1/ω2 = 8
(d) ω1/ω2 = 10

Answer
Answer : (a)
Explanation
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9. The phase angle for the transfer function

Mcq series

at corner frequency is :

(a)  – 45°
(b)  – 90°
(c)  – 135°
(d)  – 270°

Answer
Answer : (c)
Explanation
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10. Frequency response test is not recommended for system with :

(a) very low time constants
(b) with small time constant
(c) with large time constant
(d) any time constant

Answer
Answer : (c)
Explanation
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