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Q#1 Induction Machines GATE EE 2006 MCQ +2 marks -0.66 marks

The speed of a 4-pole induction motor is controlled by varying the supply frequency while maintaining the ratio of supply voltage to supply frequency (V/fJ constant. At rated frequency of 50 Hz and rated voltage of 400 V its speed is 1440 rpm. Find the speed at 30 Hz, if the load torque is constant.         

882 rpm

864 rpm

840 rpm

828 rpm

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EMFT EE 9 0 0
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