What is power factor, what types of losses are there in transformer? Etc

Question

Accepted Answer

Power factor is the ratio of real power to apparent power. Transformer losses include copper losses, core losses, and stray losses.

Power factor is a measure of how efficiently electrical power is being used.
It is the ratio of real power (measured in watts) to apparent power (measured in volt-amperes).
A power factor of 1 indicates that all the power is being used effectively, while a power factor of 0 means that no power is being used effectively.
Transformer losses include copper losses (due to resistance in the windings), core losses (due to hysteresis and eddy currents in the core), and stray losses (due to leakage flux and other factors).
Copper losses can be reduced by using larger wire or reducing the current through the transformer.
Core losses can be reduced by using high-quality magnetic materials and minimizing the flux density in the core.
Stray losses can be reduced by careful design of the transformer and minimizing the distance between windings and core.

Popular interview questions of Apprentice Engineer