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If load characteristics are drawn on OCC itself, we get curve ________

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If load characteristics are drawn on OCC itself, we get curve ________

(a) Above OCC

(b) On OCC

(c) Below OCC

(d) Intersecting OCC

This question was posed to me in an internship interview.

This is a very interesting question from No Load with On Load Characteristics of DC Generator topic in division DC Generator of DC Machines

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Best answer
Right option is (c) Below OCC

Easy explanation: Since on load operation of a DC machine, we’ll get terminal voltage less than the terminal voltage obtained in OCC, graph will start from below OCC. On load, the effect of armature reaction will draw load characteristics parallel to the OCC below it, causing no intersection.

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