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External characteristics is drawn with constant term/s ____________

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External characteristics is drawn with constant term/s ____________

(a) Field current

(b) Speed

(c) Both Field current and Speed

(d) Load

The question was asked by my college director while I was bunking the class.

This intriguing question originated from External and Armature Characteristics of DC Generator topic in chapter DC Generator of DC Machines

1 Answer

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Right answer is (c) Both Field current and Speed

The explanation is: External characteristic is a load characteristic. In this, variation of terminal voltage across armature current is drawn keeping speed and field current constant. Load is generally kept variable.

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