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When a rotary convertor is started by means of a small auxiliary motor, its power rating must be | |
A. | more than the dc output of the convertor. [Wrong Answer] |
B. | more than the ac input to the convertor. [Wrong Answer] |
C. | slightly more than the value of friction and windage losses at rated speed. [Correct Answer] |
D. | one third of dc output of the convertor. [Wrong Answer] |