I haven't found anything that has explained this to my satisfaction. In David Griffiths' Introduction to Electrodynamics, Chapter 5, Section 1, Example 5.3, the author covers the basics of how an electromagnet can lift things. He explains that even though it can appear as though the magnet is somehow lifting an object (i.e. doing work), the Lorentz Force
This leaves me puzzled as to how a permanent magnet is able to lift an object. Can someone explain that to me?
\(\vec{F}_{\text{magnetic}}=q\vec{v} \times \vec{B}=I\vec{\ell} \times \vec{B}\)
is not violated. In other words, since the magnetic force is perpendicular to the direction of motion, it cannot do work. The magnetic field merely redirects the work done by the current source. So, in reality, it is the current source (some power supply) that is doing the work necessary to lift things.This leaves me puzzled as to how a permanent magnet is able to lift an object. Can someone explain that to me?