Uncertainty of measurements

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5 Terms

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What is uncertainty of measurements?

It is the doubt that exists about the result of any measurement

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How do you determine uncertainty?

  • Find the smallest increment of measurement on your measurement device

  • Divide it by 2

  • Round it to the first non-zero number

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How do you work out the percentage error?

Uncertainty : measured value x100

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Why is there always a small degree of uncertainty in your readings or measurements?

This is often because the sensitivity of the apparatus being used is limited

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What does the sign ± mean?

It tells you the range in which the true value lies. This range is called the margin of error