Question:
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 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
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Poles contribute negative phase and zeros contribute positive phase in Bode plots.
Updated On: Feb 7, 2025
- \( + 90^\circ \)
- \( - 90^\circ \)
- \( + 180^\circ \)
- \( - 180^\circ \)
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The Correct Option is B
Solution and Explanation
The phase contribution of poles and zeros at 20 Hz is calculated as:
\[
{Phase contribution of poles} = -90^\circ, \quad {Phase contribution of zeros} = +0^\circ
\]
Thus, the total system phase at 20 Hz is \(-90^\circ\).
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