Power Electronics MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Power Electronics, a fundamental topic in the field of Electronics and Communication Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Power Electronics MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Power Electronics mcq questions that explore various aspects of Power Electronics problems. Each MCQ is crafted to challenge your understanding of Power Electronics principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Electronics and Communication Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Power Electronics MCQs are your pathway to success in mastering this essential Electronics and Communication Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Power Electronics. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Power Electronics knowledge to the test? Let's get started with our carefully curated MCQs!

Power Electronics MCQs | Page 1 of 42

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Q1.
In the below figure the average load current is 15 A. The rms value of transformer secondary current is

a.

15 A

b.

10.61 A

c.

7.5 A

d.

14.14 A

Discuss
Answer: (b).10.61 A
Q2.
A single phase half wave rectifier is feeding a resistive load. Input voltage v = Vm sin ฯ‰t. The output dc voltage is Vdc and output rms voltage is Vrms . If firing angle is 180°, Vdc and Vrms respectively are

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q3.
In a single phase full wave converter (M-2 connection) feeding on R - L load, the input voltage is v = Vm sin ฯ‰t. The expression for dc output voltage is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q4.
Figure shows a chopper feeding RLE load, The free wheeling diode conducts when

a.

thyristor is on

b.

thyristor is off

c.

both when thyristor is on and thyristor is off

d.

partly when thyristor is off and partly when thyristor is on

Discuss
Answer: (b).thyristor is off
Q5.
A dc chopper is feeding an RLE load. The maximum steady state ripple is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q6.
A thyristor needs protection against

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q7.
Two semiconverters are connected in series to form a single phase series converter. The input v = Vm sin ฯ‰t and ฮฑ1 = ฮฑ2 are the firing angles of the two converters. If ฮฑ1 = ฮฑ2 = 0, the dc output voltage is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q8.
A single phase half wave controlled rectifier circuit is feeding on RL load. The circuit has a freewheeling diode. The input voltage is v = Vm sin ฯ‰t. If I0 is the load current during the conduction of freewheeling diode, the KVL equation during the conduction of free wheeling diode is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q9.
The symbol in figure is for

a.

DIAC

b.

P-N junction diode

c.

Schottky diode

d.

None of the above

Discuss
Answer: (c).Schottky diode
Q10.
In the below figure the rms voltage across each half of secondary is 200 V. The peak inverse voltage across each of thyristor is

a.

200 V

b.

โˆš2(200) V

c.

โˆš2(400) V

d.

800 V

Discuss
Answer: (c).โˆš2(400) V
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