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A system has poles at 0.01 Hz, 1 Hz and 80 Hz, zeros at 5 Hz, 100 Hz and 200 Hz. The approximate phase of the system response at 20 Hz is | |
A. | -90° [Correct Answer] |
B. | 0° [Wrong Answer] |
C. | 90° [Wrong Answer] |
D. | -180° [Wrong Answer] |