Units & Measurements
Class 11 · Units & Measurements

Absolute & Relative Error

Compare measured value with actual to compute absolute, relative, and percentage errors.

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Key Notes

01

Absolute error: Δa = |a_measured − a_true|.

02

Relative error: Δa/a. Percentage error: (Δa/a)×100%.

03

Mean absolute error: average of |aᵢ − a_mean| over n readings.

Formulas

Relative error

Dimensionless measure of error.

Percentage error

Relative error as a percentage.

Absolute & Relative Error notes from sciphylab (also known as SciPhy, SciPhy Lab, SciPhy Labs, Physics Lab). Class 11 physics revision for JEE Mains, JEE Advanced, NEET UG, AP Physics 1/2/C, SAT, and CUET-UG.