A PMDC mator connected to 48 V supply runs on no-load at 2000 rmp drawing 1.2 A. It is found to have an armature resistance of 1.02 Ω.
(a) Calculate torque constant and no-load relational loss
(b) It is now connected to 50 V supply and runs at 2200 rpm. Calculate its shaft power output and electromagnetic torque