Diode

Capacitor

Transformer

Inductor

Apparent power, S

Reactive power, Q

Real power, P

Phase angle

P [W]

S [VA]

S [VAR]

P [kW]

corresponding

supply

root mean square (rms)

total

Both have the unit VA

|S| has direction and magnitude, S has magnitude only

Both involve rms value of current and voltage

S has direction and magnitude, |S| has magnitude only

X

Y

Re

Im

$\frac{1}{2\pi fC}$

$\frac{1}{2\pi fL}$

It does not exist

$2\pi fC$

$\frac{1}{2\pi fC}$

$2\pi fC$

$\frac{1}{2}\pi fC$

$\omega fC$

Z = R + j(X_L - X_C)

Z = R + j(X_L + X_C)

Z = R + jX_L - jX_C

Z = R + jX_L + jX_C