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Control Systems

Control Systems
If a body has identical properties all over, it is known as

 none of them.
 homogeneous.
 elastic.
 isotropic.

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Control Systems
The impulse response of a system is c(t) = -te-t + 2 e-t (t>0). Its open loop transfer function is

 (2s+2)/s²
 (2s+1)/(s+1)²
 (2s+2)/(s+1)²
 (2s+1)/s²

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Control Systems
The characteristic equation of a feedback control system is given by s³ + 5s² + (k + 6)s + k = 0. In the root loci diagram, the asymptotes of the root loci for large 'k' meet at a point in the s-plane whose coordinates are

 (-1,0)
 (2,0)
 (1,0)
 (-2,0)

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Control Systems
The magnitude condition for root locus is ..................

 |G(s)H(s)| = ∞
 |G(s)H(s)| = 2
 |G(s)H(s)| = 1
 |G(s)H(s)| = 0

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Control Systems
Transient state analysis depends on which of the following?

 nether 1 nor 2
 type of system
 both 1 and 2
 order of system

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Control Systems
When writing a transfer function which of the following loops are not valid loops?

 Neither 1 nor 2.
 Self loops at input node.
 Both 1 and 2.
 Self loops at output node.

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