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Electromagnetic Induction and Working of Read-Write Operations in Magnetic Media (1.8)
| Students Manual |
The experimental objective is to use a Hall sensor and to find the field and magnetization of a magnet. We will also gain practical knowledge of magnetic field transducers, hard disk operation and data storage, visually and analytically determining the relationship between induced EMF and magnetic flux, and indirectly measure the speed of a motor. |
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| Matlab Code |
Magnetic field |
| Lab View Code |
Sound card |
| Sample Results |
Hall Probe
Solenoid |
| Further Readings and References |
"Apparatus for teaching Physics - Measurement and Analysis of the Field of Disk Magnets", M. Connors, The Physics Teacher 40, 308-311 (2002).
"The Hard Drive: An Experiment for Faraday’s Law", B. Hinaus, M. Veum, The Physics Teacher, 40, 339-341 (2002).
"Faraday's Law - Quantitative Experiments", R. C. Nicklin, American Journal of Physics, 54(5), 422-428 (1986).
"An Experimental Observation of Faraday's Law of Induction", R. Kingman, S. C. Rowland, and S. Popescu, American Journal of Physics, 70(6), 595-598 (2002).
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Pictorial Procedure (1.8)
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 2. A Hall probe connected to the digital multimeter |
 3. Voltage value shown by the multimeter when Hall probe is connected to the computer |
 4. Attaching a disk magnet to the steel meter rule |
 5. Hall sensor's flat face is perpendicular to the magnetic axis of the disk magnet |
 6. Voltage measurement using Hall probe |
 7. Measuring the diameter of a disk magnet using vernier calliper |
 8. All the M-files must be in the current directory of MATLAB |
 9. Labview file for observing induced EMF and magnetic flux |
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 11. Setup for observing induced EMF and magnetic flux using a solenoid |
 12. Mounting a Hall probe with flat face perpendicular to the magnetic axis |
 13. Setup for observing magnetic field using a Hall probe |
