The Class 12 notes on moving charges and magnetism contain a detailed description of the various applications of Ampere's Circuital Law. Examples include (1) a long current-carrying wire producing magnetism, (2) a long current-transmitting cylinder producing a magnetic field, and (3) a current-carrying hollow cylinder producing a magnetic field. The derivations for all of these applications are provided in the Chapter 4 Moving Charges and Magnetism notes for Class 12 Physics.