Question: An 8 pole, 50 Hz, three phase slip ring induction motor has an effective rotor resistance of 0.08 Q per phase. Its speed at

An 8 pole, 50 Hz, three phase slip ring induction motor has an effective rotor resistance of 0.08 Q per phase. Its speed at maximum torque is 650 rpm. Calculate the additional resistance that should be added in the rotor to achieve maximum torque at the start of the motor.

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