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Why No-load or load characteristics are also called as magnetization characteristics?

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Why No-load or load characteristics are also called as magnetization characteristics?

(a) Ea α If

(b) Ea α φ

(c) If α φ

(d) Cannot be determined

The question was asked in final exam.

My query is from No Load with On Load Characteristics of DC Generator topic in section DC Generator of DC Machines

1 Answer

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Right answer is (b) Ea α φ

Explanation: As the generated voltage in the armature in the case of DC generator is proportional to terminal voltage, which also proportional to magnetic flux, as seen by residual voltage appearing at 0 field current. No-load and load characteristics are called as magnetization curves.

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