Phase lag of the frequency response of a second order system to a sinusoidal forcing function______________?
Correct answer: C. Approaches 180° asymptotically
- A. Is 30°
- B. Is 90° at the most
- C. Approaches 180° asymptotically
- D. Is 120°
Explanation
A second-order denominator contributes a phase lag that increases toward 180° as frequency becomes very large. It does not stop at 90°, which is the limiting behaviour of a first-order element.
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