Armature reaction: When an armature containing a number of conductors is rotated within a magnetic field, distortion of the field occurs. This effect is termed armature reaction, which was earlier used to control the output of a D.C. generator. Related posts: Personnel Management Operative Functions Administrative Role of PM Competency HR Management Role Change Personnel Policies Personnel Procedures Appealed Policies Implied Policies Specific Policies Personnel records Research Pure research Personnel research Attitude or Opinion Survey Turnover Secondary research Applied research Personnel audit Read more articles Previous PostAntifreeze Next PostBottom Dead centre (BDC)