External characteristic of DC generator with armature reaction and ohmic drops

[jaus tail]

Homework Statement

Homework Equations

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.

 

[cnh1995]

I believe your answer is correct. In a dc generator, demagnetizing effect of armature reaction (due to core saturation) reduces terminal voltage.

PS: I have an exam next month

Seeing your recent threads, I guess it's GATE 2018??