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Electronics and Communication Engineering - Measurements and Instrumentation

Exercise : Measurements and Instrumentation - Section 5
31.
A current of 3.25 A is flowing through a resistance of 34.98 Ω. The voltage drop across resistance to the appropriate number of significant figures is
113.685 V
113.68 V
113.6 V
114 V
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
The braking torque in single phase energy meter is proportional to speed of disc.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
To measure a resistance by a dc potentiometer
it is necessary to standardise the potentiometer
it is not necessary to standardise the potentiometer
it is necessary to use a volt ratio box
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
In dc tacho generators used for measurement of speed of shaft, frequent calibration is necessary because
contacts wear off
strength of permanent magnet decreases with age
armature current produces heating effect
there is back emf
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
A multimeter can be used as ohmmeter.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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