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Electronics and Communication Engineering - Measurements and Instrumentation

Exercise : Measurements and Instrumentation - Section 7
16.
A permanent magnet moving coil measures
true rms value
dc value
peak value
rms plus dc value
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
A CT is used to feed current coils of wattmeter, energy meter, power factor meter and an ammeter. Then
all the coils are in series
all coils are in parallel
the coils are in series-parallel
either (a) or (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
In measurements using strain gauge, the dummy strain gauge is used to
compensate for resistance of strain gauge
compensate for change in temperature
compensate for error due to change in voltage of battery
compensate for error in voltmeter
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
In an ac single phase energy meter, the potential coil is put on
both side limbs, of upper magnet
central limb of upper magnet
one side limb of upper magnet
either (a) or (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
The chemical effect of current is used in
dc ampere hour meter
dc ammeter
ac energy meter
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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