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Control Systems

Control Systems
Find the Laplace transform for sinωt?

 1/s
 ω/(s²+ω²)
 s/(s²+ω²)
 1/s²

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Control Systems
Number of roots in left hand half of s plane if characteristic equation is s3 - 4s2 + s + 6 = 0 ?

 3.
 1.
 2.
 0.

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Control Systems
The open loop transfer function of a unity feedback control system is given by G(s) = k/s(s+1). If the gain k is increased to infinity, then damping ratio will tend to become

 infinite
 unity
 0.707
 zero

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Control Systems
When the system gain is doubled the gain margin becomes?

 Remains unaffected
 1/2 times
None of these
 2 times

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Control Systems
The amplitude spectrum of a Gaussian pulse is

 Gaussian.
 A sine function.
 Impulse function.
 Uniform.

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Control Systems
A control system has open loop transfer function G(s) = k/(s(s + 2). Find the break away point?

 -1
 2
 1
 -2

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