The magnetic field of a permanent magnet (I)
Prediction: Calculate the magnitude of the magnetic field as a function of the distance from one of the poles along the longitudinal axis.
Prediction method:
We are going to assume that a magnet behaves similarly to an electric dipole in order to get a mathematical model for the magnetic field. This comparison is not based on any physical theory (because we know there is no magnetic charge), but it has the advantage of allowing us to simply analyze the field of a magnet.
4. Obtain an expression for the magnitude of the magnetic field B as a function of d and L assuming that all constants (Coulomb's constant and the two "magnetic" charges) are equal to one.
5. Graph B against d.
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