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?

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

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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 demagnetizing effect of armature mmf
The cross-magnetizing effect of armature mmf
The reactance voltage

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DGVCL Exam Paper (11-12-2011)
Hysteresis in an instrument means

The reliability of the instrument
The inaccuracy due to change in temperature
The repeatability of the instrument
The change in the same reading when the input is first increased and then decreased

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