A system with the transfer function (Y(s)/X(s)=s/s+p) has an output y(t)=cos(2t-π/3)for input signal x(t)=pcos(2t-π/2). Then the system parameter ‘p’ is

1.  √3

2.   2/√3

3.  1

4.  √3/2

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4
Correct Answer :

2/√3


Explanation :
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For the asymptotic Bode magnitude plot shown below, the system transfer function can be

1.   10s+1/0.1s+1

2.   100s+1/0.1s+1

3.  100s/10s+1

4.   0.1s+1/10s+1

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4
Correct Answer :

10s+1/0.1s+1



Explanation :
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For the transfer function G(jω)=5+jω, the corresponding Nyquist plot for positive  frequencies has the form

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
No Explanation available for this question

A system with transfer function G(s)=(s2+9)(s+2)/(s+1)(s+3)(s+4)    is excited by sin(ωt). The steady-state output of the system is zero at

1.   ω=1 rad/s

2.  ω=2 rad/s

3.   ω=3 rad/s

4.   ω=4 rad/s

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4
Correct Answer :

ω=3 rad/s


Explanation :
No Explanation available for this question

The Bode plot of a transfer function G(s) is shown in the figure below. The gain (20 log|G(s)|) is 32 dB and 8dB at 1 rad/s and 10rad/s respectively. The phase is negative for all ω. Then G9s) is

1.   39.8/s

2.  39.8/s2

3.   32/s

4.  32/s2

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4
Correct Answer :

39.8/s2


Explanation :
No Explanation available for this question

The open-loop DC gain of a unity negative feedback system with closed loop transfer function s+4/s2+7s+13 is

1.   4/13

2.  4/9

3.   4

4.  13

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4
Correct Answer :

4/9


Explanation :
No Explanation available for this question

The signal flow graph that that DOES NOT model the plant transfer function H(s) is

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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The transfer function of a simple RC network functioning as a controller is:.Gc(s)=s+z1/s+p1 The condition for the RC network to act as a  phse lead controller is

1.   p1

2.   P1=0

3.  p1=z1

4.   p1>z1

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4
Correct Answer :

p1>z1


Explanation :
No Explanation available for this question

A unity negative feedback closed loop system has a plant with the transfer function G9S)=1/s2+2s+2 and a controller Gc(s) in the feed forward path. For a unit step input, the transfer function of the controller that gives minimum steady state error is

1.   Gc(s)=s+1/s+2

2.  Gc(s)=s+2/s+1

3.  Gc(s)=(s+1)(s+4)/(s+2)(s+3)

4.  Gc(s)=1+(2/s)+3s

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4
Correct Answer :

Gc(s)=s+2/s+1


Explanation :
No Explanation available for this question

For the comparator circuit shown in figure forward diode voltage drop is Vy = o.7 V and reverse Zener diode voltage is 5.6 V. If hysteresis width is 1V, then value of R2 is

1.  4KΩ

2.  12.6 kΩ

3.   2 kΩ

4.  6.3 kΩ

View Answer  
4
Correct Answer :

12.6 kΩ


Explanation :
No Explanation available for this question
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