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Electronics and Communication Engineering - Automatic Control Systems

Exercise : Automatic Control Systems - Section 4
26.
As the bandwidth increases, the cost of components
generally decreases
generally increases
may increase or decrease
does not change
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
If Nyquist plot has a encirclement of (-1 + jo) point, the system is stable if
there are no poles of G(s) H(s) in right-half plane
there is one pole of G(s) H(s) in right-half plane
there is no zeros of G(s) H(s) in right-half plane
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
A conditionally stable system has
one phase crossover frequency
two phase crossover frequencies
two or more phase crossover frequencies
one or more phase crossover frequencies
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
For very low frequencies, log magnitude for the given figure is
0 dB
-3 dB
3 dB
10 dB
Answer: Option
Explanation:

If f very low, XC is very high and V0 ⋍ Vi.

30.
In a pneumatic bellows
the input surface, output surface and side walls are corrugated
the input surface and output surface are flat but the side walls are corrugated
the input surface and side walls are flat but the output surface is corrugated
the input surface and output surface are corrugated but the side walls are flat
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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