what is the power factor of a transformer?

The power factor of a transformer is a measure of how effectively it converts electrical power into useful work, typically expressed as a ratio between real power (measured in watts) and apparent power (measured in volt-amperes). Transformers ideally operate at a power factor close to unity (1.0) under full load conditions. However, the actual power factor can vary based on load conditions and the type of load connected, affecting efficiency and performance.