Computer · Electrical Measurements
In a 3-phase supply connected to a balanced 3-phase load, an electrodynamometer type wattmeter is connected to measure active power. If Vph and Iph are the phase voltage and current respectively, and φ is the phase angle between them, the reading of the wattmeter will be:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Proportional to VphIph tan(φ)
- 2Proportional to VphIph cos(φ)✓
- 3Proportional to VphIph sin(φ)
- 4Proportional to VphIph
Correct answer
Proportional to VphIph cos(φ)
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