If frequencies of two alternators in lamp dark method unequal, then two lamps will become alternately bright and dark

Q.  If the frequencies of the two alternators in lamp dark method for synchronization of alternators are unequal, then the two lamps will
- Published on 29 Oct 15

a. Glow together
b. Become alternately bright and dark
c. Not glow at all
d. None of the above

ANSWER: Become alternately bright and dark

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