DGVCL Exam Paper (11-12-2011)
Under operating conditions, the secondary of a current transformer is always short ciruited because

It avoids core saturation and high voltage induction
It is safe to human beings
It protects the primary ciruits
It protects the secondary ciruits

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

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DGVCL Exam Paper (11-12-2011)
Two parallel conductors are carrying the current in the same direction. Which of the following statements is correct?

The force increases when the distance between the conductors is increased
The force increases when the distance between the conductors is decreased
There is a repelling force between the conductors
There is an attracting force between the conductors

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