Physics · Electrical Measurements
A electrodynamometer wattmeter is rated at 10 A and 100 V with a full-scale reading of 1000 W. The inductance of the voltage circuit is 5 mH and its resistance is 3000 Ω. Voltage across the current coil is negligible. At 50 Hz and zero power factor, the error in the wattmeter at the rated VA reading will be:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 10.604 W
- 20.575 VA
- 30.523 VA✓
- 40.325 W
Correct answer
0.523 VA
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