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The polyphase induction motors are, bya very considerable margin, the most widely used ac motors as | |
A. | these are cheaper in cost, simple and rugged in construction and require little maintenance. [Correct Answer] |
B. | they are capable of operation under a wide range of power factors both leading and lagging. [Wrong Answer] |
C. | they have maximum efficiency and maximum starting torque. [Wrong Answer] |
D. | they have very good speed regulation. [Wrong Answer] |