Why is a MISC meter not recommended for DC measurement? - Measurements and Instrumentation

Electronics and Communication Engineering (ECE) : Measurements and Instrumentation - Quiz(MCQ)

Why is a MISC meter not recommended for DC measurement?

A)

The error is high due to hysteresis effect

B)

The meter does not respond to DC signals

C)

The error is high due to eddy current effect

D)

The meter is calibrated for AC and itâ€™s error for DC would be high

Correct Answer : Option (A) : The error is high due to hysteresis effect

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In measurements using strain gauge, the dummy strain gauge is used to

A)

compensate for error in voltmeter

B)

compensate for change in temperature

C)

compensate for resistance of strain gauge

D)

compensate for error due to change in voltage of battery

Correct Answer : compensate for change in temperature

A CT is used to feed current coils of wattmeter, energy meter, power factor meter and an ammeter. Then

A)

all coils are in parallel

B)

the coils are in series-parallel

C)

all the coils are in series

D)

None of the above

Correct Answer : all the coils are in series

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A)

dc value

B)

peak value

C)

true rms value

D)

rms plus dc value

Correct Answer : dc value

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