Advanced Power Electronics (3170906) MCQs

MCQs of Switching Voltage Regulators

Showing 21 to 30 out of 70 Questions
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21.

In Buck-Boost Regulator, at instant DT the magnitude of Inductor current  is ________

(a)

Zero
(b)

Maximum
(c)

Minimum
(d)

Same as supply current
Answer:

Option (b)

22.

Which of the following is the commutation period for the Buck-Boost Regulator?

(a)

T
(b)

DT
(c)

0
(d)

t_on / T
Answer:

Option (a)

23.

The function of the filter capacitor is to reduce ripple in ________

(a)

output voltage
(b)

output current
(c)

output power
(d)

none of these
Answer:

Option (a)

24.

In Buck-Boost regulator, what happens if off-time is grater than the on-time of the switch?

(a)

Vo > Vi
(b)

Vo < Vi
(c)

Vo = Vi
(d)

Insufficient data
Answer:

Option (b)

25.

Which of the following is not the advantage of Cuk Regulator?

(a)

Continuous output current since intermediate energy transfer takes place through capacitor
(b)

Ripples in output voltage and current are much smaller than that of Buck-Boost Converter
(c)

Switch & Diode have to carry both input & output Currents
(d)

A substantial weight & size reduction of cuk converter is the result of smaller filter components, because capacitive energy storage is more efficient than inductive energy storage
Answer:

Option (c)

26.

Output voltage of SEPIC Regulator is ______

(a)

[D/(1-D)] x Vi
(b)

[-D/(1-D)] x Vi
(c)

[1/(1-D)] x Vi
(d)

[(1-D)/D] x Vi
Answer:

Option (a)

27.

Choose the correct options

(a)

Buck-Boost is non inverted converter
(b)

Cuk and SEPIC converters are inverted converter
(c)

Cuk is non-inverted converter, SEPIC is inverted converter
(d)

Cuk is inverted converter, SEPIC is non-inverted converter
Answer:

Option (d)

28.

t_off (off time of the switch) can be also expressed as _________

(a)

DT
(b)

t_on / T
(c)

D/T
(d)

(1-D) x T
Answer:

Option (d)

29.

Which of the following regulators can produce step up & step down both type of output?

(a)

SEPIC
(b)

Cuk
(c)

Buck-Boost
(d)

All of these
Answer:

Option (d)

30.

What makes the SEPIC converter as the fourth order converter?

(a)

2 inductors and 2 switches
(b)

2 capacitors and 2 inductors
(c)

2 semiconductor components and 2 inductors
(d)

It is not fourth order converter at all
Answer:

Option (b)

Showing 21 to 30 out of 70 Questions
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