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Electronics and Communication Engineering - Automatic Control Systems

Exercise : Automatic Control Systems - Section 7
21.
The polar plot of transport lag is a unit circle.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
The given figure shows a hybrid servosystem. The components 1, 2, 3, 4 are respectively
amplifier, demodulator, dc servomotor and load
demodulator, amplifier, dc servomotor and load
demodulator, dc servomotor, amplifier and load
amplifier, dc servomotor, demodulator and load
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
For the signal flow graph of the given figure consider the following statements
  1. It has three forward paths
  2. It has three individual loops
  3. It has two non touching loops
Out of above the correct statements are
1, 2, 3
1, 2
2, 3
1, 3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
For the transport lag G(jω) = e-jωT, the polar plot is
a semi circle
a circle
a unit circle
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
Consider the following statements:
  1. The positiveness of coefficients of characteristic equation is necessary as well as sufficient condition for stability of first and second order systems.
  2. The positiveness of coefficients of characteristic equation ensures negativeness of real roots but is not sufficient condition for stability of third and higher order systems.
Out of above statements:
only 1 is correct
both 1 and 2 are correct
only 2 is correct
both are wrong
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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