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Q. |
A 4 pole, 50Hz , 3 phase I M is running at 1425rpm on full load having rotor impedance per phase on standstill as 0.4+j2Ω. The ratio of full load torque to maximum torque is ___. |
A. | 0.817 |
B. | 1.223 |
C. | 0.384 |
D. | 0.4705 |
Answer» D. 0.4705 |
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