DGVCL Exam Paper (11-12-2011)
Bulk power transmission over long HVDC lines are preferred on account of

No harmonic problems
Low cost of HVDC terminals
Simple protection
Minimum line power losses

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

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

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