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Gain margin and phase margin can be determined from Bode plots as well as Nyquist plot.
A
True
B
False
Correct Answer:
True
The Nyquist plot combines the two Bode plots of gain versus frequency and phase shift versus frequency on a single plot.
A
True
B
False
A big rectangular plot of area 4320 m
2
is divided into 3 square-shaped smaller plots by fencing parallel to the smaller side of the plot. However some area of land was still left as a square could not be formed. So, 3 more square-shaped plots were formed by fencing parallel to the longer side of the original plot such that no area of the plot was left surplus. What are the dimensions of the original plot ?
A
160 m × 27 m
B
240 m × 18 m
C
120 m × 36 m
D
135 m × 32 m
Assertion (A): The phase angle plot in Bode diagram is not affected by the variation in the gain of the system. Reason(R): The variation in the gain of the system has no effect on the phase margin of the system.
A
Both A and R are true but R is correct explanation of A
B
Both A and R are true but R is correct explanation of A
C
A is true but R is false
D
A is false but R is true
The unit circle of the Nyquist plot transforms into 0dB line of the amplitude plot of the Bode diagram at
A
0 frequency
B
Low frequency
C
High frequency
D
Any frequency
Annotation of plots in any plotting system involves adding points, lines, or text to the plot, in addition to customizing axis labels or adding titles. Different plotting systems have different sets of functions for annotating plots in this way. Which of the following functions can be used to annotate the panels in a multi-panel lattice plot?
A
points()
B
panel.abline()
C
lines()
D
axis()
How many types of plots can be obtained in the AC analysis of network using Bode plot?
A
Five
B
Four
C
Three
D
Two
If the Nyquist plot of the loop transfer function G (s)H (s) of a closed-loop system encloses the (1, j0) point in the G (s)H (s) plane, the gain margin of the system is
A
Zero
B
Greater than zero
C
Less than zero
D
Infinity
If a Nyquist plot of G (jω) H (jω) for a closed loop system passes through (-2, j0) point in GH plane, what would be the value of gain margin of the system in dB?
A
0 dB
B
2.0201 dB
C
4 dB
D
6.0205 dB
Consider a feedback system with gain margin of about 30. At what point does Nyquist plot crosses negative real axis?
A
-3
B
-0.3
C
-30
D
-0.03
Statement 1: Boiling point concentration diagram plots y against x. (Mole fraction in gas and liquid phase respectively). Statement 2: VLE curve plots y against x. (Mole fraction in gas and liquid phase respectively).
A
True, False
B
True, True
C
False, False
D
False, True