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DATA TABLES:Part IPhysics with Computers 29 - 4
Current in solenoid IMagnetic field B(A)(mT)0.00.0000.20.0310.40.0650.60.0990.80.1361.000.1691.200.2031.400.2351.600.2641.800.2962.000.3332.200.366Length of solenoid (m)1 mNumber of turns199Turns/m (m–1)199Part IILength of solenoidTurns/meter nMagnetic field B(m)(m–1)(mT)Physics with Computers 29 - 5
The Magnetic Field in a Slinky297.500.1931.8108.330.2171.6121.880.2581.4139.290.2971.2162.500.3951.0195.000.4980.8243.750.625Number of turns in Slinky195ANALYSIS:1.On Page 2 of the experiment file, plot a graph of magnetic field Bvs. the current Ithrough the solenoid.(Graph)2.How is magnetic field related to the current through the solenoid?3.Determine the equation of the best-fit line, including the y-intercept. Note the constants and their units.4.For each of the measurements of Part II, calculate the number of turns per meter. Enter these values in the data table. (Table)5.On Page 3 of the experiment file, plot a graph of magnetic field Bvs.the turns per meter of the solenoid (n). (Graph)6.How is magnetic field related to the turns/meter of the solenoid?Physics with Computers
7.Determine the equation of the best-fit line to your graph. Note the constants 8. From Ampere’s law, it can be shown that the magnetic field Binside a long solenoid isBnI0where 0 isthepermeability constant. Do your results agree with this equation? Explain.9. Assuming the equation in the previous question applies for your solenoid, calculate the value of 0using your graph of B vs. n.Physics with Computers
10. Look up the value of 0,thepermeability constant. Compare it to your experimental value.11. Was your Slinky positioned along an east-west, north-south, or on some otheraxis? Will this have any effect on your readings?Physics with Computers
The Magnetic Field in a SlinkyPhysics with Computers