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

1.

2.

3.

4.

4

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

4

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

4

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

4

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.

4

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

4

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

4

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

4

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

4

[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

4