If the AC voltage reaches its positive maximum while the current reaches 0, what is the phase relationship between voltage and current?

The phase relationship between voltage and current in an AC circuit can be represented using phase angles. When the AC voltage reaches its positive maximum and the current is at zero, this indicates that the voltage waveform is leading the current waveform.

In this case, the specific phase difference is 90 degrees. This occurs because the voltage waveform reaches its peak while the current is transitioning through zero, which typically occurs in a capacitive circuit. The voltage peaks before the current does, which implies that the current lags behind the voltage by a quarter of a cycle, or 90 degrees.

Understanding phase relationships is crucial in AC circuit analysis as it helps determine how voltage and current will behave relative to each other and is important for calculating power, impedance, and other factors in electrical systems.