Physics 1.4

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10 Terms

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Uncertainty
It is used to indicate any uncertainty in measurement if the uncertainty is not explicitly stated.
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Measurement Uncertainty
It quantifies the doubt that exists in any reported measurement value.
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Accuracy
It describes how close the measured value is from the ‘true’ value.
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Precision
It describes the scatter or the variability of the measurements made.
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Mean or Average
It is the sum of all the measured values divided by the number of times the measurement is done.
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Deviation or Difference
It indicates how different a specific value is from the average of a set of measurements.
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Random Error or Systematic Error
It affects the value of the uncertainty during measurement.
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Uncertainty Symbol (e.g., ±)
This symbol is used to report any uncertainty in the measurement.
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Resolution
It is the highest precision that can be achieved in an analog device.
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Least Count
It is the basis for estimating the precision of a digital device.