# Electronics and Communication Engineering - Measurements and Instrumentation

### Exercise :: Measurements and Instrumentation - Section 5

1.

Assertion (A): If the resistance of shunt of an ammeter is increased, the range of ammeter is reduced.

Reason (R): If the series resistance of a voltmeter is increased, the range of voltmeter is increased.

 A. Both A and R are true and R is correct explanation of A B. Both A and R are true but R is not correct explanation of A C. A is true R is false D. A is false R is true

Explanation:

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

2.

Two sinusoidal signals of equal amplitude and frequency are applied to X and Y plate of CRO respectively. The observed Lissajous pattern is a straight line. The phase shift between signals is

 A. zero B. 90° C. either zero or 180° D. either 90° or 270°

Explanation:

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3.

The scale of a dynamometer is linear when used as

 A. ammeter B. voltmeter C. wattmeter D. both (a) and (c)

Explanation:

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4.

Three phase four wire induction energy meter is used to measure

 A. energy in 3 phase balanced star load B. energy in 3 phase balanced delta load C. energy in 3 phase unbalanced load D. either (a) or (b)

Explanation:

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5.

 A. pure metals B. pure insulators C. tintered mixture of metallic oxides D. pure semiconductors