MCQs of Switching Voltage Regulators (Advanced Power Electronics - 3170906)

Showing 41 to 50 out of 70 Questions

41.

Choose all possible options. Unidirectional core excitation referes to ___________

(a)	Only 1st quadrant in B-H curve of x'mer over one cycle operation
(b)	3rd & 4th quadrant in B-H curve of x'mer over one cycle operation
(c)	1st and 3rd quadrants in B-H curve of x'mer over one cycle operation
(d)	Only 4th quadrant in B-H curve of x'mer over one cycle operation

42.

Size of the x'mer reduces for same power handling capability if it is operated with principle of ___________

(a)	Unidirection core excitation
(b)	Bidirectional core excitation

43.

What is the x-axis parameter on B-H curve of inductive element?

44.

Usually, how many points of saturation are there on hysteresis loop?

45.

There is always need of separate L in the Flyback dc-dc converter.

(a)	Yes
(b)	No

46.

What is the necessity of having center tapping in x'mer for push-pull converter?

(a)	To increse the power rating
(b)	To utiize the x'mer core fully
(c)	To provide freewheeling action more efficiently
(d)	To provide isolation

47.

In mode 3 operation of push-pull converters, which windings of the x'mer do take part in operation?

(a)	Upper Primary, Lower Secondary
(b)	Lower Primary, Upper Secondary
(c)	Lower Primary, Lower Secondary
(d)	None of these

48.

How to avoid flux imbalance in x'mer core?

(a)	Select proper rating of core
(b)	By doing proper center tapping
(c)	Select proper turns
(d)	None of these

49.

Is it possible to produce dc voltage higher than the input using fluback?

(a)	Yes
(b)	No

50.

Choose all possible correct answers. Which of the following SMPS have secondary winding of the transformer with center tapping?

Showing 41 to 50 out of 70 Questions