It is a fascinating and interesting experience for me to come up with demos for the first-year Physics course on Electromagnetism. I am right now trying a couple of things: (i) one is modeling the fall of a magnet through a copper pipe as viscous drag; (ii) the second one is to measure the magnetic dip and estimating the latitude by modeling the earth as a magnetic dipole.
An exact computation might be hard. However, it is easy to see that the force is proportional to velocity and opposes the motion. Hence, the model treating it as viscous drag with one unknown coefficient is used.
Add a comment...