Q. 41 The armature resistance of a permanent magnet dc motor is 
At no load,the motor draws 1.5 A from a supply voltage of 25 V and runs at 1500 rpm.The efficiency of the motor while it is operating on load at 1500 rpm drawing a current of 3.5 A from the same source will be
(A) 48.0%
(B) 57.1%
(C) 59.2%
(D) 88.8%
Answer:(A)
Explanation:
