Hey, does impedance vary with time in a simple R-L AC circuit?
- billrussell42Lv 72 months agoFavourite answer
no, the impedance is a complex number that does not vary with time. It is typically expressed in terms of resistance, inductance, and capacitance.
However, if you express it in ohms with a j component, it does very with frequency.
For a series circuit of a resistor R, a capacitor C and
an inductor L, the impedance may be calculated as follows:
Capacitive Reactance Xc = 1/(2πfC) = 1/ωC
Inductive Reactance Xʟ = 2πfL = ωL
Impedance Z = √(R² + X²)
where X = Xʟ – Xc
ω = 2πf