DGVCL Exam Paper (11-12-2011)
The form factor in AC means the ration of

Peak value to average value
R.M.S. value to peak value
Peak value to r.m.s value
R.M.S. value to average value

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DGVCL Exam Paper (11-12-2011)
The purpose of embedding the damper winding in the pole face of a synchronous motor is to

Reduce winding losses
Eliminate losses on account of fair friction
Eliminate hunting and provide adequate starting torque
Reduce bearing friction

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DGVCL Exam Paper (11-12-2011)
The corona effect can be minimized by increasing

Both spacing between the conductors and diameter of the conductor
Spacing between the conductors
Diameter of the conductor
The length of the conductor

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