Electronic measurements and instrumentation miscellaneous
- The advantage of electrodynamometer type instruments:
As the coils are air cored, these instruments as free from
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The advantage of electrodynamometer type instrument is that these instruments are free from hysteresis and eddy current errors.
Correct Option: A
The advantage of electrodynamometer type instrument is that these instruments are free from hysteresis and eddy current errors.
- The sensitivity of an instrument is the:
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The sensitivity of an instrument is the ratio of the change in the magnitude of the output to the corresponding change in the magtidue of the input.
Correct Option: C
The sensitivity of an instrument is the ratio of the change in the magnitude of the output to the corresponding change in the magtidue of the input.
- The measured value of resistance is 105Ω and its true value is 100Ω. The relative percentage error will be:
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Given, Measured value = 105Ω
True value = 100Ω
= Measured value – True value
Absolute error, δA = 105 – 100 = 5Relative error = Absolute error true value
orRelative error = δA = 5 = 0.05 A 100
Percentage error = 5%Correct Option: A
Given, Measured value = 105Ω
True value = 100Ω
= Measured value – True value
Absolute error, δA = 105 – 100 = 5Relative error = Absolute error true value
orRelative error = δA = 5 = 0.05 A 100
Percentage error = 5%
- Which of the following instruments will have the same calibration on both AC and DC?
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Electrodynamometer type instrument will have the same calibration on both AC and DC.
Correct Option: A
Electrodynamometer type instrument will have the same calibration on both AC and DC.
- Instrument used for AC measurement alone is:
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Induction type instrument is used for AC measurement only.
Correct Option: D
Induction type instrument is used for AC measurement only.
