WorksheetsErrors in Measurement
Total questions: 10
Worksheet time: 5mins
Which of the following is a systematic error?
Random fluctuation in readings due to human observation
Parallax error in reading an analog scale
Electrical noise in a voltmeter
Thermal noise in a resistor
The accuracy of a measuring instrument refers to:
Closeness of repeated measurements
Closeness of measurement to true value
Range of the instrument
Resolution of the instrument
A voltmeter has a systematic error of +0.2 V. The true voltage is 12.0 V. The instrument reading will be:
11.8 V
12.0 V
12.2 V
12.4 V
The resolution of an instrument is defined as:
Maximum error of measurement
Smallest change in measured quantity detectable
Average error in repeated measurements
Maximum range of the instrument
Which of the following improves both accuracy and precision?
Using a high-resolution instrument only
Calibration and careful measurement
Repeating measurements only
Ignoring environmental conditions
The percentage error in a measurement is defined as:
Absolute error / True value × 100
Absolute error × True value × 100
Instrument range / Reading × 100
Corrected reading / Measured reading × 100
In measurement theory, the mean squared error (MSE) combines:
Only systematic error
Only random error
Both systematic and random errors
Only gross error
Instrument drift is:
Random fluctuation of readings
Slow change of zero point over time
Sudden wrong readings due to mishandling
Variation of instrument sensitivity with load
Which of the following strategies reduces random errors in a measurement system?
Calibration with standard
Shielding from environmental noise
Repeated measurement and averaging
Using high-quality instrument only
The calibration of an instrument is done to:
Reduce random error
Reduce systematic error
Reduce gross error
Improve resolution
