Electronics and Communication Engineering - Power Electronics

Why Electronics and Communication Engineering Power Electronics?

In this section you can learn and practice Electronics and Communication Engineering Questions based on "Power Electronics" and improve your skills in order to face the interview, competitive examination and various entrance test (CAT, GATE, GRE, MAT, Bank Exam, Railway Exam etc.) with full confidence.

Where can I get Electronics and Communication Engineering Power Electronics questions and answers with explanation?

IndiaBIX provides you lots of fully solved Electronics and Communication Engineering (Power Electronics) questions and answers with Explanation. Solved examples with detailed answer description, explanation are given and it would be easy to understand. All students, freshers can download Electronics and Communication Engineering Power Electronics quiz questions with answers as PDF files and eBooks.

Where can I get Electronics and Communication Engineering Power Electronics Interview Questions and Answers (objective type, multiple choice)?

Here you can find objective type Electronics and Communication Engineering Power Electronics questions and answers for interview and entrance examination. Multiple choice and true or false type questions are also provided.

How to solve Electronics and Communication Engineering Power Electronics problems?

You can easily solve all kind of Electronics and Communication Engineering questions based on Power Electronics by practicing the objective type exercises given below, also get shortcut methods to solve Electronics and Communication Engineering Power Electronics problems.

1. 

A cycloconverter can be

A. step down
B. step up
C. step down or step up
D. none of the above

Answer: Option C

Explanation:

The output frequency can be more or less than input frequency.


2. 

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

Answer: Option B

Explanation:

RMS secondary current = = 15/1.414 = 10.608 A.


3. 

In a 3 phase fully controlled converter the firing frequency is

A. 3 times the line frequency
B. 6 times the line frequency
C. 9 times the line frequency
D. 12 times the line frequency

Answer: Option B

Explanation:

It is a 6 pulse converter.


4. 

Two thyristor of same rating and same specifications

A. will have equal turn on and turn off periods
B. will have equal turn on but unequal turn off periods
C. may have equal or unequal turn on and turn off periods
D. will have unequal turn on and turn off periods

Answer: Option C

Explanation:

Turn on and turn off times of similar SCRs may not be same.


5. 

The amount of dielectric heating is inversely proportional to frequency.

A. True
B. False

Answer: Option B

Explanation:

It is proportional to frequency.


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