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Home ‣ Electronics and Communication Engineering ‣ Automatic Control Systems Comments
- Question
Options- Correct Answer
- dB magnitude and log ?
ExplanationFrequency is plotted on log scale and magnitude is taken in dB.
Automatic Control Systems problems
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- 1. In the given figure, of potentiometer V0 = Vi (R0/Ri) only when
Options
Discuss
Correct Answer: RL = ?
Explanation:
If RL is not infinite, the voltage ratio of potentiometer depends on the value of RL. This is called loading effect.- 2. The given figure shows a pole zero diagram. The transfer function G(j1) is
Options
Discuss
Correct Answer: 0.5 ?0
Explanation:
Join j1 point with the zero and poles. Find magnitude and phase angles of all these lines.- 3. For the given figure C(s)/R(s)
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
Explanation:
.
- 4. For the given figure,
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
Explanation:
For the inner loop, transfer function =
Then
.
- 5. In Bode diagram (log magnitude plot) the factor
in the transfer function gives a line having slope
Options
Discuss
Correct Answer: -6 dB per octave
Explanation:
For
term the slope is -20 dB/decade or -6 dB/octave because - 20 log 2 = -6 dB.
- 7. For the circuit in the given figure,
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
Explanation:
.
- 8. For the given figure C(s)/R(s)
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
Explanation:
.
- 9. For the circuit in the given figure, V2(s)/V1(s) =
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
Explanation:
.
- 10. In the given figure, the input frequency is such that R = XC. Then
Options
Discuss
Correct Answer: v0 lags vi by 45°
Explanation:
R = XC, voltage drops across R and XC are equal and at 90° with respect by each other. V0 lags Vi by 45°.
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- 1. In the given figure, of potentiometer V0 = Vi (R0/Ri) only when