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ElectricalMeasurement & Instrumentation
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The meter constant of a single phase 240 V induction watthour meter is 400 revolutions per KWh. The speed of the meter disc for a current of 10 Amperes of 0.8 p.f lagging will be

A

21.1 rpm.

B

18.2 rpm.

C

16.02 rpm.

D

12.8 rpm.

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