22. resistance = 0.25 ohm. Contact drop per brush = 1 V. Armature reaction weakens the field by 5 per cent on full-load. [Ans. 748 r.p.m.| A four-pole D.C. shunt motor working on 250 V takes a current of 2 A when running at 1, 000 r.p.m. Whatanbsp;...
|Title||:||A Textbook of Electrical Engineering|
|Author||:||R. K. Rajput|
|Publisher||:||Firewall Media - 2004-01-01|