ERIC Number: EJ1037451
Record Type: Journal
Publication Date: 2014-May
Abstractor: As Provided
Reference Count: 2
EM Induction Experiment to Determine the Moment of a Magnet
Najiya Maryam, K. M.
Physics Education, v49 n3 p319-325 May 2014
If we drop a magnet through a coil, an emf is induced in the coil according to Faraday's law of electromagnetic induction. Here, such an experiment is done using expEYES kit. The plot of emf versus time has a specific shape with two peaks. A theoretical analysis of this graph is discussed here for both short and long cylindrical magnets. Mathematical expressions are derived for both. Knowing this equation, experiments to calculate the moment of a magnet can be devised. If we use a long conducting tube instead of a simple coil in this experiment, it can even help in measuring the eddy current damping coefficient k.
Descriptors: Science Instruction, Science Experiments, Magnets, Motion, Scientific Principles, Energy, Equations (Mathematics), Computation, Teaching Methods
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Authoring Institution: N/A