Des formules électrique

P = U * I * cos(φ), where U is voltage, I is current, and φ is the phase angle.

Q = U * I * sin(φ), where U is voltage, I is current, and φ is the phase angle.

S = √(P² + Q²), where P is active power and Q is reactive power.

Watt (W)

Volt-Ampere Reactive (VAR)

Volt-Ampere (VA)

ω = 2π * f, where f is the frequency.

i(t) = I_max * sin(ωt + φ), where I_max is the max current, ω is angular frequency, t is time, and φ is the phase angle.

u(t) = U_max * sin(ωt + φ), where U_max is the max voltage, ω is angular frequency, t is time, and φ is the phase angle.

cos(φ) = R / Z, where R is resistance and Z is impedance.

Radian per second (rad/s)

Ammeters, voltmeters, and wattmeters.

Using an oscilloscope.

Z = √(R² + (ωL)²), where R is resistance, ω is angular frequency, and L is inductance.

Ohm (Ω)