NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics Physics and Measurement-Errors in Measurement Revision (Page 1 of 1)

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# Types of Errors

• Absolute Error – The difference between the true value and the individual measured value of the quantity is called the absolute error of the measurement.

• Suppose a physical quantity is measured times and the measured values are . The arithmetic mean of these values is –

• If the true value of the quantity is not given then mean value can be taken as the true value. Then the absolute errors in the individual measur

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# Propagation of Errors in Mathematical Operations

• Rule I – The maximum absolute error in the sum or difference of the two quantities is equal to the sum of the absolute errors in the individual quantities. If and if and represents the absolute errors in and respectively, then the maximum absolute error in and

The result will be written as (in terms of absolute error) and (in terms of percentage error).

• Rule II – The maximum fractional or relative

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