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 an attracting force between the conductors
There is a repelling force between the conductors

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DGVCL Exam Paper (11-12-2011)
The purpose of interpoles in DC machines is to nullify

The cross-magnetizing effect of armature mmf
The reactance voltage
Both the cross-magnetizing mmf and the reactance voltage
The demagnetizing effect of armature mmf

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DGVCL Exam Paper (11-12-2011)
The purpose of skewing of rotor slots in an induction motor is

To increase the distributuion factor
To reduce the magnetic hum of the motor
To increase the breadth factor
To reduce the locking tendency of the rotor

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