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Mark the correct order for the external characteristics of compound generators from the below graph.

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Mark the correct order for the external characteristics of compound generators from the below graph.

(a) 1: over compound, 2: level compound, 3: under compound, 4: differential compound

(b) 1: under compound, 2: level compound, 3: over compound, 4: differential compound

(c) 1: differential compound, 2: level compound, 3: under compound, 4: over compound

(d) 1: over compound, 2: differential compound, 3: under compound, 4: level compound

This question was posed to me by my school teacher while I was bunking the class.

Asked question is from Operating Characteristics of DC Generators topic in division DC Generators of Electrical Machines

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The correct choice is (a) 1: over compound, 2: level compound, 3: under compound, 4: differential compound

Best explanation: Over compounding provides maximum voltage difference at no load while the differential compunding has least.

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