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The armature resistance of a PMDC motor is 0.8 Ω. At no load, the motor draws 1.5 A from a supply voltage of 25 V and runs at 1,500 rpm. The efficiency of the motor while it is operating on load at 1,500 rpm drawing a current of 3.5 A from the same source will be | |
A. | 0.48 [Correct Answer] |
B. | 0.571 [Wrong Answer] |
C. | 0.592 [Wrong Answer] |
D. | 0.888 [Wrong Answer] |