DGVCL Exam Paper (11-12-2011)
All the peripheral devices connected to a computer require power to work. Which of the following voltages is required for the motherboard to work?

Positive cycle of sine wave
Negative cycle of sine wave
DC
AC

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

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

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

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

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