Electromagnetic

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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.
Matlab Code Magnetic field
Lab View Code Sound card
Sample Results Hall Probe
Solenoid
Distance vs magnetic field strength
Geometric function vs magnetic strength
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).

Pictorial Procedure (1.8)

1. Provided apparatus
1. Provided apparatus
2. A Hall probe connected to the digital multimeter
2. A Hall probe connected to the digital multimeter
3. Voltage value shown by the multimeter when Hall probe is connected to the computer
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
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
5. Hall sensor's flat face is perpendicular to the magnetic axis of the disk magnet
6. Voltage measurement using Hall probe
6. Voltage measurement using Hall probe
7. Measuring the diameter of a disk magnet using vernier calliper
7. Measuring the diameter of a disk magnet using vernier calliper
8. All the M-files must be in the current directory of MATLAB
8. All the M-files must be in the current directory of MATLAB
9. Labview file for observing induced EMF and magnetic flux
9. Labview file for observing induced EMF and magnetic flux
10. Mounting a solenoid
10. Mounting a solenoid
11. Setup for observing induced EMF and magnetic flux using a solenoid
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
12. Mounting a Hall probe with flat face perpendicular to the magnetic axis
13. Setup for observing magnetic field using a Hall probe
13. Setup for observing magnetic field using a Hall probe
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