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

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

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

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

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DGVCL Exam Paper (11-12-2011)
An IDMT relay provides

An inverse characteristic for low values of the fault current and a definite time characteristic for high values of the fault current
A definite time characteristic for low values of the failt current and an inverse characteristic for high values of the fault current
A definite time cuttent characteristic
An inverse time current characteristic

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