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When the load on an alternator is varied, its terminal voltage also changes due to _____________

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When the load on an alternator is varied, its terminal voltage also changes due to _____________

(a) armature resistance

(b) leakage reactance

(c) armature reaction

(d) all of the mentioned

The question was asked during an interview.

I need to ask this question from Voltage Regulation of an Alternator topic in division Synchronous Generators of Electrical Machines

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Best answer
Right answer is (a) armature resistance

Easiest explanation: Armature reactance, leakage reactance and armature reaction cause the terminal voltage to differ from the excitation voltage.

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