Cosphi
Cosphi, often written as cosφ, denotes the cosine of the phase angle φ between voltage and current in alternating current circuits. It is most commonly used to describe the power factor of an electrical system.
In sinusoidal steady state, voltage and current can be represented as phasors V and I with a
The magnitude of cosφ lies between 0 and 1 for typical passive loads, with cosφ = 1 indicating
In practice, a high cosφ (close to 1) means more efficient use of electrical power, as less
Cosphi also appears as a general mathematical symbol for the cosine of an angle φ in contexts beyond