Exercise: Automatic Control Systems

Questions for: Automatic Control Systems

The polar plot of is the negative imaginary axis.
A:
True
B:
False
C:
D:
Answer: A
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Assertion (A): If the Laplace transform is , the Laplaces transform of impulse response is given by

Reason (R): The Laplace transform for an impulse function is 1.

A:
Both A and R are correct and R is correct explanation of A
B:
Both A and R are correct but R is not correct explanation of A
C:
A is correct but R is wrong
D:
R is correct but A is wrong
Answer: A

Since £[δ(t)] = 1, .

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In a pneumatic bellows
A:
the input surface, output surface and side walls are corrugated
B:
the input surface and output surface are flat but the side walls are corrugated
C:
the input surface and side walls are flat but the output surface is corrugated
D:
the input surface and output surface are corrugated but the side walls are flat
Answer: B
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For very low frequencies, log magnitude for the given figure is
A:
0 dB
B:
-3 dB
C:
3 dB
D:
10 dB
Answer: C

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

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A conditionally stable system has
A:
one phase crossover frequency
B:
two phase crossover frequencies
C:
two or more phase crossover frequencies
D:
one or more phase crossover frequencies
Answer: C
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