DGVCL Exam Paper (11-12-2011)
The purpose of providing a choke in a tube light is

To limit the current to an appropriate value
To avoid radio interference
To improve the power factor
To eliminate corona effect

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

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

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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 decreased
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 increased

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