The true power indicated by a wattmeter...

Question 1 of 270705eccefa4bacbc34ba4d480f0

The true power indicated by a wattmeter depends on the current flow through the load, the magnitude of the voltage across the load, and what other factor?

Back

Question 1 of 27070

Q

The true power indicated by a wattmeter depends on the current flow through the load, the magnitude of the voltage across the load, and what other factor?

🔍 Key Concepts

• True power vs. apparent power in AC circuits • Relationship between voltage, current, and phase angle • How a wattmeter measures power in an AC system

💭 Think About

• Think about what makes the actual usable power in an AC circuit different from just volts × amps. • Which option relates to the phase relationship between current and voltage in an AC load? • Ask yourself: what quantity must a wattmeter effectively account for to show real (true) power instead of just apparent power?

✅ Before You Answer

• Identify which choice is directly tied to the phase angle between voltage and current. • Eliminate any options that describe mechanical properties of the meter rather than an electrical property of the load. • Confirm which factor appears in the formula for real power in AC circuits: $P = V \times I \times ?$ .