While conducting OCC, in order to avoid hysteresis loop, in which direction If should be increased?(a) -ve direction(b) +ve direction(c) In any direction(d) In both direction there exists hysteresis loopI have been asked this question in homework.I'd like to ask this question from No Load with On Load Characteristics of DC Generator in division DC Generator of DC Machines

While conducting OCC, in order to avoid hysteresis loop, in which dire

1.	While conducting OCC, in order to avoid hysteresis loop, in which direction If should be increased?(a) -ve direction(b) +ve direction(c) In any direction(d) In both direction there exists hysteresis loopI have been asked this question in homework.I'd like to ask this question from No Load with On Load Characteristics of DC Generator in division DC Generator of DC Machines
Answer» Right answer is (b) +ve direction For explanation I would say: In conducting the OCC test, If must be raised gradually only in the FORWARD direction OTHERWISE the curve would exhibit local HYSTERESIS loops. In OCC at If =0 there EXISTS small residual voltage shown by non-zero Voc.

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