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Q#1 Induction Machines GATE EE 2007 MCQ +2 marks -0.66 marks

A three phase squirrel cage induction motor has a starting current of seven times the full load current and full load slip of 5%.

If an autotransformer is used for reduced voltage starting to provide 1.5 per unit starting torque, the autotransformer ratio (%) should be

57.77%

72.56%

78.25%

81.33%

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Network Analysis 259 0 0
Signals and Systems 164 0 0
Control Systems 201 0 0
Analog Electronics 180 0 0
Digital Electronics 148 0 0
Electrical Machines 390 0 0
Power Electronics 237 0 0
Power Systems 343 0 0
EMFT EE 9 0 0
Measurement 152 0 0
Engineering Mathematics 225 0 0
General Aptitude 206 0 0