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

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

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

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

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