SSC JE Electrical Engineering 2017 Set 3 Paper

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Question : 197 of 200

Marks: +1, -0

Which of the following is true about low frequency operation of a.c. series motor ?

It improves its commmutation property but affects adversely the p.f. and efficiency
It improvers its commutation property p.f. and efficiency
It affects adversely commmutation but improves p.f. and efficiency
None of these

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