A 3-phase AC power supply is used to power a factory's lights. What is the relationship between the current and voltage in each phase?
Q1. A 3-phase AC power supply is used to power a factory's lights. What is the relationship between the current and voltage in each phase?
Answer: Current lags voltage by 90°
Explanation: Current and voltage are 90° out of phase in each phase; this is known as a 'lagging' phase