The opposite of susceptibility is___________?
A. Immunity
B. Emission
C. Interference
D. Electromagnetic compatibility
The output current in PWM DC – DC converters is equal to___________?
The output current in PWM DC – DC converters is equal to___________?
A. Average value of the output inductor current
B. Product of an average inductor current and a function of duty ratio
C. Either A. or B.
D. None of these
A step – down choppers can be used in___________?
A step – down choppers can be used in___________?
A. Electric traction
B. Electric vehicles
C. Machine tools
D. All of these
In a lossless inverter, the average power absorbed in one period by the load must be__________?
In a lossless inverter, the average power absorbed in one period by the load must be__________?
A. Equal to the average power supplied by the dc source
B. Greater than the average power supplied by the dc source
C. Lesser than the average power supplied by the dc source
D. Equal to the average power supplied by the ac source
The ac voltage controller can be used for ___________?
The ac voltage controller can be used for ___________?
A. Lighting and heating control
B. On – line transformer tap changing
C. Soft starting
D. All of these
In a full bridge VSI, in order to avoid the short circuit across the DC bus and the undefined AC output voltage condition, the modulating technique should ensure that___________?
In a full bridge VSI, in order to avoid the short circuit across the DC bus and the undefined AC output voltage condition, the modulating technique should ensure that___________?
A. Top switch of each leg is on at any instant
B. Bottom switch of each leg is on at any instant
C. Either A. or B.
D. None of these
The phase angle of gate signal in TRIAC can be shifted by using_____________?
The phase angle of gate signal in TRIAC can be shifted by using_____________?
A. A capacitor
B. A variable resistor
C. An inductor
D. Only (a) and (b)
In the SPWM, the modulating signal is___________?
In the SPWM, the modulating signal is___________?
A. Square
B. Sinusoidal
C. Triangular
D. Saw – tooth
A TRIAC can be turned on with______________?
A TRIAC can be turned on with______________?
A. Positive voltage at the gate terminal
B. Negative voltage at the gate terminal
C. Either (a) or (b)
D. None of these
The transfer function of PWM is generally developed in______________?
The transfer function of PWM is generally developed in______________?
A. Time domain
B. Frequency domain
C. Either A. or B.
D. None of these