What is the formula for the power factor?

What is the formula for the power factor?

• A. P/S
• B. P×S
• C. P+S
• D. P-S

Answer: (A)

The power factor is defined as the ratio of real power (P) to apparent power (S). Real power, measured in watts, represents the actual power consumed by the circuit to perform work, while apparent power, measured in volt-amperes, represents the combination of real power and reactive power in the system. The formula for power factor is expressed as: Power Factor = Real Power (P) / Apparent Power (S) Since the correct answer reflects this fundamental relationship, it demonstrates an understanding of how power factor quantifies the efficiency of electrical power usage in an AC system. A high power factor indicates efficient utilization of electrical power, while a low power factor signifies that a significant portion of power is reactive and not doing any useful work.

The power factor is defined as the ratio of real power (P) to apparent power (S). Real power, measured in watts, represents the actual power consumed by the circuit to perform work, while apparent power, measured in volt-amperes, represents the combination of real power and reactive power in the system.

The formula for power factor is expressed as:

Power Factor = Real Power (P) / Apparent Power (S)

Since the correct answer reflects this fundamental relationship, it demonstrates an understanding of how power factor quantifies the efficiency of electrical power usage in an AC system. A high power factor indicates efficient utilization of electrical power, while a low power factor signifies that a significant portion of power is reactive and not doing any useful work.