# Electronics - Transformers

## Why Electronics Transformers?

In this section you can learn and practice Electronics Questions based on "Transformers" 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 Transformers questions and answers with explanation?

IndiaBIX provides you lots of fully solved Electronics (Transformers) 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 Transformers quiz questions with answers as PDF files and eBooks.

## Where can I get Electronics Transformers Interview Questions and Answers (objective type, multiple choice)?

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

## How to solve Electronics Transformers problems?

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

### Exercise :: Transformers - General Questions

1.

When does maximum power transfer happen from the source to the load?

 A. When the source resistance is greater than the load resistance B. When the source resistance is less than the load resistance C. When there is negligible source resistance D. When the source resistance equals the load resistance

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

2.

A transformer is plugged into a 120 V rms source and has a primary current of 300 mA rms. The secondary is providing 18 V across a 10 load. What is the efficiency of the transformer?

 A. 88% B. 90% C. 92% D. 95%

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

3.

The coefficient of coupling between two coils is 0.45. The first coil has an inductance of 75 mH and the second coil has an inductance of 105 mH. What is the mutual inductance between the coils?

 A. 3.54 mH B. 7.88 mH C. 39.9 mH D. 189.3 mH

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

4.

Increasing the number of turns of wire on the secondary of a transformer will

 A. increase the secondary current B. decrease the secondary current C. have no effect on the secondary current D. increase the primary current

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

5.

What is the turns ratio of the transformer needed to match a 1 k source resistance to a 160 load?

 A. 2.5:1 B. 0.4:1 C. 6.25:1 D. 16:1

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

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