# A single phase voltage source inverter is feeding a purely inductive load as shown in the figure. The inverter is operated at 50 Hz in 1800 square wave mode. Assume that the load current does not have any dc component. The peak value of the inductor current i0 will be

1.  6.37 A

2.  10 A

3.  20 A

4.  40 A

4

10 A

Explanation :
No Explanation available for this question

# A 400 V, 50 Hz, 4 pole, 1400 rpm, star connected squirrel cage induction motor has the following parameters referred to the stator Rr’=1.0 Ω, Xr’=1.5 Ω.Neglect stator resistance and core and rotational losses of the motor.The motor is controlled from a 3-phase voltage source inverter with constant V/f control. The stator line-to-line voltage (rms) and frequency to obtain the maximum torque at starting will be

1.  20.6 V, 2.7 Hz

2.  133.3 V, 16.7 Hz

3.  266.6 V, 33.3 Hz

4.  323.3 V, 40.3 Hz

4

133.3 V, 16.7 Hz

Explanation :
No Explanation available for this question

# A single phase fully controlled converter bridge issued for electrical braking of a separately excited dc motor. The dc motor load is represented by an equivalent circuit as shown in the figure. Assume that the load inductance is sufficient to ensure continuous and ripple free load current. The firing angle of the bridge for a load current of I0 = 10 A will be

1.  440

2.  510

3.  1290

4.  1360

4

1290

Explanation :
No Explanation available for this question

# A three phase fully controlled bridge converter is feeding a load drawing a constant and ripple free load current of 10 A at a firing angle of 300. The approximate Total Harmonic Distortion (%THD) and the rms value of fundamental component of the input current will respectively be

1.  31% and 6.8 A

2.  31% and 7.8 A

3.  66% and 6.8 A

4.  66% and 7.8 A

4

31\% and 7.8 A

Explanation :
No Explanation available for this question

# In the circuit shown in the figure,the switch is operated at a duty cycle of 0.5. A large capacitor is connected across the load.The inductor current is assumed to be continuous.The average voltage across the load and the average current through the diode will respectively be

1.  10 V, 2 A

2.  10V, 8A

3.  40 V, 2 A

4.  40 V, 8 A

4

10 V, 2 A

Explanation :
No Explanation available for this question

# The transfer function of a linear time invariant system is given as .The steady state value of the output of this system for a unit impulse input applied at time instant t = 1 will be

1.  0

2.  0.5

3.  1

4.  2

4

0.5

Explanation :
No Explanation available for this question

# The transfer functions of two compensators are given below.Which one of the following statements is correct

1.  C1, is a lead compensator and C2 is a lag compensator

2.  C1 is a lag compensator and C2 is a lead compensator

3.  Both C1 and C2 are lead compensators

4.  Both C1 and C2 are lag compensators

4

C1, is a lead compensator and C2 is a lag compensator

Explanation :
No Explanation available for this question

# The asymptotic Bode magnitude plot of a minimum phase transfer function is shown in the figure.This transfer function has

1.  Three poles and one zero

2.  Two poles and one zero

3.  Two poles and two zeros

4.  One pole and two zeros

4

Two poles and two zeros

Explanation :
No Explanation available for this question

# Figure shows a feedback system where K>0.The range of K for which the system is stable will be given by

1.  0

2.  0

3.  0

4.  K>390

4

0<K<390

Explanation :
No Explanation available for this question

# The transfer function of a system is given as .This system is

1.  an overdamped system

2.  an underdamped system

3.  a critically damped system

4.  an unstable system

4

a critically damped system

Explanation :
No Explanation available for this question

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