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Question
The meter constant of a single-phase, 100 V induction watt-meter is 600 rev/kW-h. The speed of the meter disc for a current of 15 A at 0.8 power factor lagging will be?
Options:
A .  30.3 rpm
B .  16 rpm
C .  12 rpm
D .  33.1 rpm
Answer: Option C
Answer: (c).12 rpm

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