2.1 - Physical Quantities, Units and Measurements Flashcards Preview

OCR Physics A Level > 2.1 - Physical Quantities, Units and Measurements > Flashcards

Flashcards in 2.1 - Physical Quantities, Units and Measurements Deck (7):
1

What are Random Errors?

Errors that give measurements scattered randomly above and below the true value when the measurement is repeated

2

What is a Systematic Error?

An error that is introduced by an inaccuracy in the apparatus or its use by the person conducting the experiment

3

What is a Zero Error?

A type of systematic error caused when an instrument is not properly calibrated or adjusted

4

What is Precision?

The degree to which repeated values, collected under the same conditions in an experiment, show the same results

5

What is Accuracy?

The degree to which a value obtained by an experiment is close to the actual or true value

6

What is Absolute Uncertainty?

It shows how large the uncertainty in a measurement actually is

7

What is Percentage Uncertainty?

The absolute Uncertainty divided the measured value expressed as a percentage (%)