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Question
Q7. A. Explain the working principle of a three-phase induction motor. What are the various types of rotors? (6)
B. An 18.65kW, 6-pole, 50Hz, 3 phase slip ring induction motor runs at 960 rpm on full load with a rotor current per phase of 35A, allowing 1kW for mechanical losses, find the resistance per phase of 3-phase rotor winding. (10)
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