Phys 1 Student Workbook.pdf

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Physics Labs with Computers, Vol. 1Student WorkbookP31: Magnetic Field of a Permanent Magnet 012-07000AAnalyzing the Data1. Click to make the Graph display active.2. Rescale the Graph axes to show the data and apply a fit to the data.• In DataStudio, click the ‘Scale to fit’ button ( ) to rescale the Graph axes. Next, clickthe ‘Fit’ menu button ( ) and select ‘Inverse Square’. If the Mean Square Error islarge, click and hold down on the mouse button while dragging the mouse to select aregion of data. When the mouse button is released, the data points will be highlighted.Only highlighted data points will be used for the fit.• In ScienceWorkshop, click the ‘Statistics’ button to open the Statistics area on the rightside of the Graph. Click the ‘Autoscale’ button ( ) to rescale the Graph axes to show thedata. In the Statistics area, click the Statistics Menu button ( ). Select ‘Curve Fit,Power Fit’ from the Statistics Menu. A message stating that there is no valid solution mayappear. If it does, click on the number next to a4 and type -2. If the same messageappears, or the value of chi^2 is very large, select a section of data that appears to be themost smooth. To select a region, click and hold down on the mouse button while draggingthe mouse. Release the mouse button. The selected region will be highlighted. Onlyhighlighted data points will be used for the fit.3. Record the equation of fit in the Data Table in the Lab Report section.Record your results in the Lab Report section.p. 226 ©1999 PASCO scientific P31
Name _____________________ Class ______________ Date _________Lab Report - Activity P51: Magnetic Field of a Permanent MagnetWhat Do You Think?How does the strength of the magnetic field of a permanent (disk) magnet change with distance?Data TableItemEquationEquation of FitQuestions1. Does the magnetic field strength increase or decrease as the distance from the magnet isincreased?2. Is the relationship between magnetic field strength and distance linear?3. Based on the results of the curve fit in the statistics area, what is the relationship betweenthe magnetic field strength and the distance from the magnet?P31 ©1999 PASCO scientific p. 227
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