We’ve covered all of the magnetism work that you will need for the prelim at the end of the month. You don’t need to know about inductors for this paper.
Here are some resources to get your revision underway.
We use permanent magnets and electromagnets in class, but to create a really strong magnetic field requires a superconducting magnet like the one in this video.
Disclaimer: I used to work for the company that built that magnet.