Magnetic Fields and Electromagnetism is the study of magnetic forces, magnetic fields, and their interactions with electric charges and currents. In AP Physics C: Electricity & Magnetism, this unit introduces magnetic forces on moving charges and current-carrying wires, magnetic field calculations using the Biot-Savart Law and Ampère's Law, and the fundamental principles of electromagnetism. It focuses on how magnetic fields are generated by moving charges and how they exert forces on other moving charges and currents. Mastery of magnetic fields helps understand electromagnetic devices, motors, generators, and the fundamental relationship between electricity and magnetism.