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The efficiency of a dc series machine cannot be determined by Swinburne's test as | |
A. | a series motor has very high starting torque. [Wrong Answer] |
B. | a series motor draws excessive current from the supply mains on no load. [Wrong Answer] |
C. | a series motor runs ai dangerously high speed on no load. [Correct Answer] |
D. | all of the above. [Wrong Answer] |