In electrical engineering, phase angle is the angular difference in phase between two sinusoidal waves or signals. It is typically measured in degrees or radians, and it represents the amount of shift or delay between the two signals.
Phase angle is an important concept in electrical engineering because it can affect the way that two signals interact with each other. For example, if two signals are in phase (i.e. their phase angles are 0 degrees), they will add together constructively, resulting in a larger combined signal. On the other hand, if two signals are out of phase (i.e. their phase angles are not 0 degrees), they may cancel each other out, resulting in a smaller combined signal.
Phase angle is also an important concept in AC electrical systems, where it can affect the way that electrical power is transferred between components. For example, the phase angle between the voltage and current in an AC circuit can affect the power factor and the efficiency of the circuit.