The zero-sequence circuit of the three phase transformer shown in the figure is

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

Given that the op-amp is ideal, the output voltage V0 is

1.  4V

2.  6V

3.  7.5V

4.  12.12V

View Answer  
4
Correct Answer :

6V


Explanation :
No Explanation available for this question

Assuming that the diodes in the given circuit are ideal,the voltage V0 is

1.  4V

2.  5V

3.  7.5V

4.  12.12V

View Answer  
4
Correct Answer :

5V


Explanation :
No Explanation available for this question

The power electronic converter shown in the figure has a single-pole double-throw switch.The pole P of the switch is connected alternately to throws A and B.The converter shown is a

1.  step-down chopper (buck converter)

2.  half-wave rectifier

3.  step-up chopper (boost converter)

4.  full-wave rectifier

View Answer  
4
Correct Answer :

step-down chopper (buck converter)


Explanation :
No Explanation available for this question

Figure shows a composite switch consisting of a power transistor (BJT) in series with a diode.Assuming that the transistor switch and the diode are ideal, the I-V characteristic of the composite switch is

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

The fully controlled thyristor converter in the figure is fed from a single-phase source.When the firing angle is 0°,the dc output voltage of the converter is 300V.What will be the output voltage for a firing angle of 60°,assuming continuous conduction

1.  150V

2.  210V

3.  300V

4.  100nV

View Answer  
4
Correct Answer :

150V


Explanation :
No Explanation available for this question

At t = 0,the function f (t)=sint/t has

1.  a minimum

2.  a discontinuity

3.  a point of inflection

4.  a maximum

View Answer  
4
Correct Answer :

a maximum


Explanation :
No Explanation available for this question

A box contains 4 white balls and 3 red balls. In succession, two balls are randomly selected and removed from the box. Given that the first removed ball is white, the probability that the second removed ball is red is

1.  1/3

2.  3/7

3.  1/2

4.  4/7

View Answer  
4
Correct Answer :

1/2


Explanation :
No Explanation available for this question

An eigenvector of p=

1.  [-1 1 1]T

2.  [1 2 1]T

3.  [1 -1 2]T

4.  [2 1 -1]T

View Answer  
4
Correct Answer :

[1 2 1]T


Explanation :
No Explanation available for this question

For The differential equation  with intial conditions x(0)=1 and

1.  x(t)=2e-6t-e-2t

2.  x(t)=2e-2t-e-4t

3.  x(t)=-e-6t+2e-4t

4.  x(t)=e-2t+2e-4t

View Answer  
4
Correct Answer :

x(t)=2e-2t-e-4t


Explanation :
No Explanation available for this question
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