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Control Systems

Control Systems
Which of the following is the electrical analogous element for displacement in force-voltage analogy?

 Charge.
 Voltage.
 Current.
 Flux.

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Control Systems
The characteristic equation of a control system is give by s(s + 4)(s² + 2s + 1) + k(s + 1) = 0. Find the angle between the asymptotes?

 120°
 360°
 60°
 180°

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Control Systems
The maximum phase lag occurs at the ------------------- of the two corner frequencies?

 arithmetic mean
None of these
 geometric mean
 either 1 or 2

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Control Systems
For the polynomial , find the number of roots which lie on the right half of s-plane?

 0
 1
 4
 2

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Control Systems
Transfer function of zero order hold response is

 (1 / s) × (1 - est).
 (1 / s) × (1 - e-st).
 (s) × (1 - est).
 (1 / s) × e-st.

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Control Systems
Find the Laplace transform for sinωt?

 ω/(s²+ω²)
 1/s²
 1/s
 s/(s²+ω²)

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