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External characteristics of DC shunt motor lies in ______________

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External characteristics of DC shunt motor lies in ______________

(a) 1^st quadrant

(b) 2^nd quadrant

(c) 1^st and 2^nd quadrant

(d) 4^th quadrant

The question was asked in an online quiz.

Question is taken from Graphical Representation of External Characteristics in division DC Generator of DC Machines

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The correct answer is (c) 1^st and 2^nd quadrant

To elaborate: When external characteristics are plotted on graphs, and if effect of armature reaction is not considered graph lies in 1st quadrant only. When effect of armature reaction is considered we shift the origin thus, characteristics lies in 2^nd quadrant as well.

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