WorksheetsErrors and practical physics A level
Total questions: 13
Worksheet time: 17mins
A measurement result is considered ________ if it is judged to be close to the true value. It is influenced by random and systematic errors.
Precise
Accurate
An error
Resolution
A quality denoting the closeness of agreement (consistency) between values obtained by repeated measurement. It is influenced by random effects and can be expressed numerically.
Repeatability
Precision
Uncertainty
Resolution
Any measurement will have some ____________. This will come from variation in the data obtained and be subject to systematic or random effects. This can be estimated by considering the instruments and the method and will usually be expressed as a range such as 20 ± 2 °C.
Error
Precision
Reproducibility
Uncertainty
The dashed line in the image represents
The error bars
The uncertainty
Line of best fit
Line of worst fit
The solid blue lines in the image represent...
The error bars
The uncertainty
Line of best fit
Line of worst fit
The black lines either side of the points are
The error bars
The spread of data
Line of best fit
Line of worst fit
To find the uncertainty in the gradient..
Use y=mx + c
Look at the spread of the error bars
Gradient of line of worst fit x 2
Gradient of line of worst fit - gradient of line of best fit
Which of these statements is true
Anomalous data should be included when drawing any trends
The line of worst fit only must pass through all error bars (excluding anomalous data)
The line of best fit only must pass through all error bars (excluding anomalous data)
Both the line of best fit and the line of worst fit must pass through all error bars (excluding anomalous data)
When you add or subtract two quantities, you...
add or subtract the uncertainty
add or subtract the percentage uncertainty
multiply the two percentage uncertainty
When you multiply or divide two quantities, you...
add the percentage uncertainties
subtract the percentage uncertainties
add the absolute uncertainties
When a quantity is raised to a power, you...
multiply the percentage uncertainty by that power
divide the percentage uncertainty by that power
add the percentage uncertainty to that power
multiply the absolute uncertainty by that power
The equation for a pendulum states the time period, T=2πgL , where L is the length. You do an experiment recording T and L. If you plot L2 against T, what would the gradient & y-intercept be?
Gradient = g4π2 , y-intercept=0
Gradient = g2π , y-intercept=0
Gradient = g4π2 , y-intercept = 2πg
Gradient = g2π , y-intercept= 2πg
