Title  

In a flyback converter, the inductor of the buckboost converter has beenreplaced by aIn a flyback converter, the inductor of the buckboost converter has beenreplaced by a
The answer is:
C. Flyback transformer


For bidirectional operation of convertersFor bidirectional operation of converters
The answer is:
A. A parallel combination of controllable switch and a diode is used


For a buck converter to reduce the conduction losses in diodeFor a buck converter to reduce the conduction losses in diode
The answer is:
B. A low on  resistance switch can be added in parallel


A step  down choppers can be used inA step  down choppers can be used in
The answer is:
D. All of these


In a flyback converter, the inductor of the buckboost converter has beenreplaced by aIn a flyback converter, the inductor of the buckboost converter has beenreplaced by a
The answer is:
C. Flyback transformer


For bidirectional operation of convertersFor bidirectional operation of converters
The answer is:
A. A parallel combination of controllable switch and a diode is used


For a buck converter to reduce the conduction losses in diodeFor a buck converter to reduce the conduction losses in diode
The answer is:
B. A low on  resistance switch can be added in parallel


A step  down choppers can be used inA step  down choppers can be used in
The answer is:
D. All of these


The output current in PWM DC  DC converters is equal toThe output current in PWM DC  DC converters is equal to
The answer is:
C. Either (a) or (b)


Advantages of Cuk converter is / areAdvantages of Cuk converter is / are
The answer is:
D. None of these


In a push  pull converter, the filter capacitor can be obtained asIn a push  pull converter, the filter capacitor can be obtained as
The answer is:
C. Cmin= ( 1 – 2 D ) V / 32 ( Vr L f2 )


The control method used for PWM dc  dc converter isThe control method used for PWM dc  dc converter is
The answer is:
D. All of these


The control method used for PWM dc  dc converter isThe control method used for PWM dc  dc converter is
The answer is:
B. Current mode control


In current commutated DCDC choppers, the voltage spike appears acrossthe load whenIn current commutated DCDC choppers, the voltage spike appears acrossthe load when
The answer is:
C. Both (a) and (b)


In a load commutated DC  DC chopper, the capacitor has aIn a load commutated DC  DC chopper, the capacitor has a
The answer is:
C. Symmetric trapezoidal voltage across itself


Voltage commutation circuit can be converted into a current commutationby interchanging the positions ofVoltage commutation circuit can be converted into a current commutationby interchanging the positions of
The answer is:
A. Diode and capacitor


During the commutation period in 3 phase converter, overlap time isDuring the commutation period in 3 phase converter, overlap time is
The answer is:
C. Dependent on both the load current and load voltage behind the short circuit current


In a three phase converter, the number of notches per cycle isIn a three phase converter, the number of notches per cycle is
The answer is:
C. Six


Unipolar modulation is generally used inUnipolar modulation is generally used in
The answer is:
D. DC  DC converters


Very large values of modulation index (greater than 3.24) lead toVery large values of modulation index (greater than 3.24) lead to
The answer is:
A. Square AC output voltage

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