DGVCL Exam Paper (11-12-2011)
The main advantage of using fractional pitch winding is to refuce

Amount of copper in the winding
Harmonics in the generated emf
Size of the machine
Cost of the machine

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DGVCL Exam Paper (11-12-2011)
The advantage of slipring induction motor over the squirrel cage induction motor is

It can be started with the help of rotor resistances
It's power factor is higher
It is suitable for higher speeds
It has a higher efficiency

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