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Electronics and Communication Engineering - Automatic Control Systems

Exercise : Automatic Control Systems - Section 4
21.
If then f(t) =
cos θ0t
sin ω0t
eat cos ω0t
e-at cos ω0t
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
When time constant T in any factor is varied, the shapes of log magnitude and phase angle curves remain the same.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
Which of the following is not correct for two phase servomotor?
Rotor diameter is small
Applied voltages are seldom balanced
Rotor resistance is low
Torque speed curve is linear
Answer: Option
Explanation:

In this motor ratio is small or R is high.

24.
Given figure shows the magnitude plot for a system. The steady state error for unit step input is
1/101
1/100
1/41
1/40
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
DC servomotors are, generally
permanent magnet dc motors
shunt field motors
separately excited dc motors
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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