The amplitude ratio for the sinusoidal response of __________ is < 1?
Correct answer: D. First order system
- A. Transportation lag
- B. None of these
- C. Second order system
- D. First order system
Explanation
For a first-order system, the sinusoidal amplitude ratio is 1 divided by the square root of 1 plus the squared frequency time constant, so it is less than one at nonzero frequency. A pure transportation lag changes phase but not amplitude.
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