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Experiment_6 - Experiment 6 Part 1 Induction Magnet Through...

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Experiment 6 Part 1 – Induction: Magnet Through a Coil Part 2 – Transformer Ahmad Rahman Date Preformed- 02-20-09 Date Due- 02-27-09
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Part 1 – Induction: Magnet Through a Coil Purpose To measure the electromotive force (emf) induced in a coil by a magnet dropping through the center of the coil. Theory When a magnet is passing through a coil there is a changing in magnetic flux through the coil, which indices an electromotive force (emf) in the coil. According to Faraday’s law of induction: =- ε N ∅ t o Where ε is the induced emf, N is the number of turns of wire in the coil, and ∅ t is the rate of change of the magnetic flux through each turn of the coil. When the magnet is entering the coil the magnetic flux through the coil increases with time. When the magnet Is leaving the coil the magnetic flux through the coil decreases with time. The incoming and outgoing peaks can be displayed as either positive or negative peaks depending on the connections of the voltage probes to the coil.
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