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Electronics and Communication Engineering - Measurements and Instrumentation

Exercise : Measurements and Instrumentation - Section 6
21.
The resistance of voltmeter affects the accuracy of measurement in loss of charge method.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
In a hot wire instrument, the deflection is proportional to
peak value of ac current
average value of ac current
rms value of ac current
either (a) or (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
A permanent magnet moving coil meter can be used as
ac only
dc only
both ac and dc
low frequency ac and dc
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
If temperature increases by about 50°, the resistance of thermistor changes to
half of its initial value
twice of its initial value
eight times of its initial value
one eight of its initial value
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
Which of the following draws minimum power from source?
PMMC
Electronic voltmeter
Electrostatic voltmeter
Moving iron voltmeter
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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