Physics · Electrical Measuring Instruments
The meter constant of a single-phase 240 V induction watt-hour meter is 400 revolutions per kWh. The speed of the meter disc for a current of 10 A at 0.8 power factor lagging will be:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 121.1 rpm
- 218.2 rpm
- 316.02 rpm
- 412.8 rpm✓
Correct answer
12.8 rpm
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