Frequency-Domain Analysis (Bode, Nyquist, Root Locus) — MCQs – EE

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1. Frequency-domain analysis deals with system behavior in terms of:



2. The Bode plot of a system represents:



3. The Bode plot is generally drawn on:



4. The slope of a magnitude plot decreases by 20 dB/decade for each:



5. The slope of a magnitude plot increases by 20 dB/decade for each:



6. The point where the slope of a Bode magnitude plot changes is called the:



7. The gain margin of a system is measured at the frequency where:



8. The phase margin is measured at the frequency where:



9. For a stable feedback system, the gain margin should be:



10. A Nyquist plot represents the relationship between:



11. The Nyquist stability criterion helps determine:



12. In a Nyquist plot, encirclement of the point (–1, 0) indicates:



13. If the Nyquist plot does not encircle the critical point and the open-loop system has no poles in the right half-plane, the system is:



14. The root locus method shows how the locations of system poles change with variation in:



15. The root locus starts from:



16. The root locus ends at:



17. The number of root locus branches is equal to the number of:



18. On the real axis, the root locus exists where the total number of poles and zeros to the right is:



19. The intersection of the root locus with the imaginary axis indicates:



20. The root locus technique was developed by:



21. In Bode plots, the frequency range over which the magnitude remains within 3 dB of its low-frequency value is known as:



22. In a Nyquist plot, clockwise encirclement of the critical point indicates:



23. Increasing the system gain moves the closed-loop poles on the root locus:



24. The intersection of magnitude and phase plots in Bode analysis determines:



25. The Nyquist plot of a stable system typically lies:



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