DGVCL Exam Paper (11-12-2011)
Ybus used in power flow studies and Zbus used in short circuit studies

Are transpose of each other
Are inverse of each other
Have no inter relation
Are the same

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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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DGVCL Exam Paper (11-12-2011)
Distribution transformers have good all day efficiency due to

Low copper loss
Low iron loss
Low voltage
Low copper as well as iron loss

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