The new educational book Physics for 12th Grade - Orientation Group of Positive Sciences and Health Studies, Volume III contains the chapters: Magnetic Field and Electromagnetic Induction and responds to the new teaching-exam material for 2022-23, as defined in the relevant Government Gazette 3731/14.07.2022. The chapters of the book are organized into eleven (11) teaching units, each of which includes: Study proposal, Theory, Methodology for solving exercises and Application examples, Solved exercises, Topics for response [multiple choice, True/False, multiple choice with justification] and Exercises-Problems to solve. At the end of the book, there are detailed answers-solutions to the topics, exercises, and problems.