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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.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true R is false
A is false R is true
Answer: Option
Explanation:
No answer description is available. Let's 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
zero
90°
either zero or 180°
either 90° or 270°
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
The scale of a dynamometer is linear when used as
ammeter
voltmeter
wattmeter
both (a) and (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
Three phase four wire induction energy meter is used to measure
energy in 3 phase balanced star load
energy in 3 phase balanced delta load
energy in 3 phase unbalanced load
either (a) or (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
Thermistors are made of
pure metals
pure insulators
tintered mixture of metallic oxides
pure semiconductors
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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