External characteristics of a DC generator are.... (multiple choice)

AI Thread Summary
The discussion revolves around the external characteristics of a DC generator, specifically the relationship between magnetic characteristics, armature reaction, and ohmic drop. The original poster believes that external characteristics should equal magnetic characteristics minus the armature reaction drop and ohmic drop. However, the textbook answer suggests that the correct formula includes the magnetization characteristics plus the armature reaction minus the ohmic drop. The poster expresses confusion over the textbook answer and seeks clarification, noting the urgency due to an upcoming exam. The conversation highlights the importance of understanding the effects of armature reaction on terminal voltage in DC generators.
jaus tail
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Homework Statement


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Homework Equations


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The Attempt at a Solution


I think External char = Magnaetic characteristics - Armature reaction drop - Ohmic drop since we're subtracting these values from voltage.
But book answer is D. Magnetization char + armature reaction - Ohmic drop.
Is book answer wrong or have I goofed up somewhere?

PS: I have an exam next month and so asking so many questions.
 

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I believe your answer is correct. In a dc generator, demagnetizing effect of armature reaction (due to core saturation) reduces terminal voltage.
jaus tail said:
PS: I have an exam next month
Seeing your recent threads, I guess it's GATE 2018??
 
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