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Cogging and crawling are phenomenon associated with | |
A. | cage induction machines and they are essentially the same. [Wrong Answer] |
B. | squirrel cage induction machines, the former during starting and the latter at a fraction of its rated speed. [Correct Answer] |
C. | squirrel cage induction machines, the former at a fraction of its rated speed and the latter during starting. [Wrong Answer] |
D. | wound rotor induction machines and they are reduced by skewing, chording and distribution of windings. [Wrong Answer] |