A power factor meter measures what aspect of electrical power usage?

A power factor meter measures what aspect of electrical power usage?

• A. Voltage level
• B. Current draw
• C. The power factor, indicates the efficiency of electrical power usage
• D. Frequency

Answer: (C)

Power factor is a measure of how effectively the electrical power you supply is being converted into useful work. It’s the ratio of real power (watts that actually do work) to apparent power (volt-amperes drawn from the source). A high power factor, near 1, means most of the current is doing productive work and the system uses energy efficiently. A low power factor means a lot of the current is reactive power, which doesn’t do real work but increases current, causes more losses in wiring and equipment, and can lead to higher charges or limited capacity. The meter thus indicates how efficiently electrical power is used. It doesn’t directly measure voltage, instantaneous current, or frequency, though those factors influence the power factor. Inductive loads like motors tend to lower PF by causing current to lag voltage, while capacitive effects can raise PF.

Power factor is a measure of how effectively the electrical power you supply is being converted into useful work. It’s the ratio of real power (watts that actually do work) to apparent power (volt-amperes drawn from the source). A high power factor, near 1, means most of the current is doing productive work and the system uses energy efficiently. A low power factor means a lot of the current is reactive power, which doesn’t do real work but increases current, causes more losses in wiring and equipment, and can lead to higher charges or limited capacity. The meter thus indicates how efficiently electrical power is used. It doesn’t directly measure voltage, instantaneous current, or frequency, though those factors influence the power factor. Inductive loads like motors tend to lower PF by causing current to lag voltage, while capacitive effects can raise PF.