The term for power that is actually delivered by the circuit, measured in watts, is called?

The term for power that is actually delivered by the circuit, measured in watts, is called?

• A. True Power
• B. Apparent Power
• C. Reactive Power
• D. Complex Power

Answer: (A)

Real power, also called true power, is the portion of electrical power that actually does work in the circuit. It represents the average power over a cycle and is measured in watts. It can be calculated as P = V_rms I_rms cos(phi), where phi is the phase angle between voltage and current and cos(phi) is the power factor. The other two concepts—apparent power (S = V_rms I_rms, measured in VA) and reactive power (Q = V_rms I_rms sin(phi), measured in VAR)—describe the total power flow and the energy temporarily stored and returned by reactive components, respectively. Complex power combines them as S = P + jQ. So the term for power actually delivered in watts is real (true) power.

Real power, also called true power, is the portion of electrical power that actually does work in the circuit. It represents the average power over a cycle and is measured in watts. It can be calculated as P = V_rms I_rms cos(phi), where phi is the phase angle between voltage and current and cos(phi) is the power factor. The other two concepts—apparent power (S = V_rms I_rms, measured in VA) and reactive power (Q = V_rms I_rms sin(phi), measured in VAR)—describe the total power flow and the energy temporarily stored and returned by reactive components, respectively. Complex power combines them as S = P + jQ. So the term for power actually delivered in watts is real (true) power.