# Electronics and Communication Engineering - Measurements and Instrumentation

## Why Electronics and Communication Engineering Measurements and Instrumentation?

In this section you can learn and practice Electronics and Communication Engineering Questions based on "Measurements and Instrumentation" 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 Measurements and Instrumentation questions and answers with explanation?

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

Here you can find objective type Electronics and Communication Engineering Measurements and Instrumentation 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 Measurements and Instrumentation problems?

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

### Exercise :: Measurements and Instrumentation - Section 1

1.

To increase Q factor of a coil, the wire should be

 A. long B. thin C. thick D. long and thin

Explanation:

Q is high if resistance is low. Therefore, wire should be thick.

2.

An ammeter of 0-25 A range has a guaranteed accuracy of 1% of full scale reading. The current measured is 5 A. The limiting error is

 A. 2% B. 2.5% C. 4% D. 5%

Explanation:

.

3.

The coil of a moving iron instrument has a resistance of 500 Ω and an inductance of 1 H. It reads 250 V when a 250 V dc is applied. If series resistance is 2000 Ω, its reading when fed by 250 V, 50 Hz ac will be

 A. 260 V B. 252 V C. 250 V D. 248 V

Explanation:

4.

In 3 phase power measurement by two wattmeter method, the reading of one wattmeter is zero. The power factor of load is

 A. 1 B. 0.5 C. 0 D. 0.8

Explanation:

When p.f. = 0.5, 0 = 60° and one of the wattmeters reads zero.

5.

In a CRO which of the following is not a part of electron gun

 A. cathode B. grid C. accelerating anode D. X - Y plates