# A 3-phase transmission line supplies -connected load Z.The conductor ‘c’ of the line develops an open circuit fault as shown in figure.The currents in the lines are as shown on the diagram.The +ve sequence current component in line ‘a’ will be

1.  5.78-30o

2.  5.7890o

3.  6.3390o

4.  10.00-30o

4

5.78-30o

Explanation :
No Explanation available for this question

# A 500 MVA,50 Hz,3-phase turbo-generator produces power at 22 kV.Generator is Y-connected and its neutral is solidly grounded.Its sequence reactances are X1=X2=0.15 and Xo=0.05 pu.It is operating at rated voltage and disconnected from the rest of the system.The magnitude of the sub-transient line current for single line to ground fault at the generator terminal in pu will be

1.  2.851

2.  3.333

3.  6.667

4.  8.553

4

2.851

Explanation :
No Explanation available for this question

# A 50 Hz,4-pole,500 MVA,22 kV turbo-generator is delivering rated mega-volt amperes at 0.8 power factor.Suddenly a fault occurs reducing is electric power output by 40%.Neglect losses and assume constant power input to the shaft.The accelerating torque in the generator in MNm at the time of the fault will be

1.  1.528

2.  1.018

3.  0.848

4.  0.509

4

1.528

Explanation :
No Explanation available for this question

# A hydraulic turbine having rated speed of 250 rpm is connected to a synchronous generator.In order to produce power at 50 Hz,the number of poles required in the generator are

1.  6

2.  12

3.  16

4.  24

4

24

Explanation :
No Explanation available for this question

# Assuming that the diodes are ideal in the figure,the current in diode D1 is

1.  8 mA

2.  5 mA

3.  0 mA

4.  -3 mA

4

0 mA

Explanation :
No Explanation available for this question

# The transconductance gth of the transistor shown in figure is 10 mS.The value of the input resistance RIN is

1.  10.0 kΩ

2.  8.3 kΩ

3.  5.0 kΩ

4.  2.5 kΩ

4

5.0 kΩ

Explanation :
No Explanation available for this question

# The value of R for which the PMOS transistor in the figure will be biased in linear region is

1.  220 Ω

2.  470 Ω

3.  680 Ω

4.  1200 Ω

4

1200 Ω

Explanation :
No Explanation available for this question

# In the active filter circuit shown in the figure,if Q=1 a pair of poles will be realized with  equal to

4

Explanation :
No Explanation available for this question

# The simplified form of the Boolean expression,Y=( can be written as

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

1.  1010,1010

2.  0101,0101

3.  0010,0010

4.  0010,1011

4