This is the gold standard. It contains hundreds of fully solved problems and is widely available in PDF format for academic use.
The search for "1000 solved problems in electromagnetism pdf" typically leads to a few definitive academic resources, most notably the work of A.A. Kamal published by 1000 solved problems in electromagnetism pdf
: Coulomb’s Law, electric fields, Gauss’s Law, and electric potential. This is the gold standard
Most university exams are structured around problem-solving. Practicing with a large volume of questions ensures you won't be surprised by a tricky geometry or a multi-dielectric setup. Core Topics Every PDF Should Cover 1000 solved problems in electromagnetism pdf