Physics A-Level
Measurement uncertainty and control of variables
What Measurement uncertainty and control of variables means in Physics A-Level, as defined for AQA.
Definition of Measurement uncertainty and control of variables
Check what you remember
Read the wording for your board, then hide it and explain Measurement uncertainty and control of variables in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
The diameter is measured at several positions and orientations and averaged to reduce random error, and the current is kept small and switched off between readings so temperature stays approximately constant.
Topics that use Measurement uncertainty and control of variables
- Resistivity (AQA A-Level)
Related terms
- Charge carriers and scattering
- Experimental determination of resistivity
- Graphical analysis using gradients
- Magnetic field generation
- Materials and critical limits
- Non-linear resistance–temperature graphs
- ntc thermistor
- Potential divider
Using Measurement uncertainty and control of variables in the exam
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