INDEX 



Action of a generator, principle of 24 



of a motor, principle of 25 



Active component of current and e.m.f 205 



power in an alternating current circuit 206 



Air cooled transformer 289 



Air gap, effective area of 48 



effect of unequal, in a generator 435 



factors determining length 43 



reluctance of 67 



Alternating current, definition of 196 



Alternation, meaning of 196 



Alternator, excitation of 232 



frequency of e.m.f. generated by 231 



general construction of 229 



shape of e.m.f. wave of 198-199, 234 



Ampere, definition of 9 



Ampere-turns, calculation of proper number for specified field frame 65 



cross magnetizing, of a C-C. armature 120 



demagnetizing, of a C-C. armature 120 



meaning of term 64 



Amortisseur, used to prevent hunting 312, 328 



Analogy, mechanical, of a synchronous motor 328 



Anglo of brush shift 123 



of phase difference of e.m.f. and current 203 



Armature reaction 22, 244 



effect of, on speed of a motor 165 



effect of, on voltage of a generator 130 



limits length of air gap 43 



Armature resistance, calculation of 101 



effect of, on speed of a motor 163 



effect of, on terminal voltage of a generator . 101 



453 



