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Unformatted text preview: 5) Click Start and drop the magnet through the coil. 6) Data recording will stop after 0.5 seconds and start when the magnet falls through the coil and end when the voltage reaches 0.05 V. 7) Click Scale to Fit. 8) Select a region enclosing the first peak of the voltage plot and record the Area. 9) Repeat step 8 for the second peak. Theory Statement Because a magnetic field can be detected when electricity is passed through a conducting wire, Faraday suggested and experimented with measuring electricity, or the electromotive force (EMF), of a coil of conducting wire when passing a magnet through the coil. Therefore, by using Faraday's Law of Induction, =- Nt where is the EMF, N is the number of coils, is the flux, and t is the change in time, and making a plot of EMF versus time, the area under the curve is found by integration and represents the flux. 1 2...
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This note was uploaded on 02/28/2011 for the course PHYS 255b taught by Professor Shoemaker during the Fall '10 term at SIU Carbondale.
- Fall '10