In the real power formula P = V × I × PF, what does PF represent?

In the real power formula P = V × I × PF, what does PF represent?

• A. Power Factor
• B. Phase Frequency
• C. Peak Flux
• D. Pulse Factor

Answer: (A)

PF represents the Power Factor, a measure of how much of the electrical power is doing useful work in AC circuits. It reflects the cosine of the phase angle between voltage and current, capturing the difference between real power and apparent power. In the formula P = V × I × PF, the PF scales the product of voltage and current to give real power, since not all the drawn power is used for work when the current lags or leads due to reactive elements. A PF of 1 means all the power is real work (purely resistive load); a PF less than 1 indicates some power is reactive, not contributing to useful output.

PF represents the Power Factor, a measure of how much of the electrical power is doing useful work in AC circuits. It reflects the cosine of the phase angle between voltage and current, capturing the difference between real power and apparent power. In the formula P = V × I × PF, the PF scales the product of voltage and current to give real power, since not all the drawn power is used for work when the current lags or leads due to reactive elements. A PF of 1 means all the power is real work (purely resistive load); a PF less than 1 indicates some power is reactive, not contributing to useful output.