The vector depicting the amplitude of the voltage U coincides in direction with the vector depicting the amplitude of the current strength 1 The voltage fluctuations on the capacitor lag in phase by n / 2 from the current fluctuations, therefore the vector depicting U lags behind the vector depicting l by an angle of 90 °. The voltage fluctuations on the coil are ahead of the phase current fluctuations by n / 2, so the vector representing U is ahead of the vector representing I by an angle of 90 °.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.