# Signal flow graph is used to find

1.   Stability of the system

2.  Controllability of the system

3.   transfer function of the system

4.  Poles of the system

4

transfer function of the system

Explanation :
No Explanation available for this question

# The step error coefficient of a system  With unity feedback is

1.   1/6

2.   ∞

3.  0

4.  1

4

1/6

Explanation :
No Explanation available for this question

# For a second order system, sampling ratio, (ξ) is 0

1.   Real but not equal

2.  Real and equal

3.  Complex conjugates

4.   Imaginary

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Complex conjugates

Explanation :
No Explanation available for this question

# The transfer function of a linear system is the

1.   Ratio of the output, V0(t), and input, V1(t)

2.  Ratio of the devatives of the output and the input

3.  Ratio of the Laplace transforms of the output and that of the input with all initial conditions zero

4.  None of these

4

Ratio of the Laplace transforms of the output and that of the input with all initial conditions zero

Explanation :
No Explanation available for this question

# Non-minimum phase transfer function is defined as the transfer function

1.   Which has zeros in the right-half S-plane

2.  Which has zeros only in the left-half S-plane

3.  Which has poles in the right-half S-plane

4.  Which has lopes in the left half s-pane

4

Which has poles in the right-half S-plane

Explanation :
No Explanation available for this question

# For the system shown in figure, with a damping ratio ξ of 0.7. And an undamped natural frequency ωn of 4 rad/sec, the values of K and a are

1.  K=4,       a=0.35

2.   K =8,      a= 0.455

3.   K =16,    a= 0.225

4.  K = 64,    a= 0.9

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K =16,    a= 0.225

Explanation :
No Explanation available for this question

# In the signal flow graph of figure y/x equals

1.  3

2.   5/2

3.   2

4.   None of the above

4

2

Explanation :
No Explanation available for this question

# A control linear time invariant system has the state and the output equations given below If x1 (0) = 1, x2(0) = -1, µ(0) = 0, then  is

1.   i

2.   -1

3.  0

4.  None of the above

4

0

Explanation :
No Explanation available for this question

# Match each of the items 1,2 on the left with the most appropriate items A, B, C, or D on the right. Negative feedback in 1. Voltage series configuration 2. Current shunt configuration (A) Increases input impedance (B) Decreases input impedance (C. Increases closed loop gain (D) Leads to oscillation

1.   1-A                                   2-B

2.  1-B                                   2-C

3.   1-C                                    2-D

4.   1-B                                    2-D

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1-A                                   2-B

Explanation :
No Explanation available for this question

# The Z-transform of the time function  is

1.

2.

3.

4.

4 