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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, =-ε N∆φ∆t where ε is the EMF, N is the number of coils, Δφ is the flux, and Δt 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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- Fall '10
- Physics, Magnetic Field, Faraday, Faraday's law of induction