Impedance in RL Circuits

Impedance is the resultant of phasor addition of R and XL.

The symbol for impedance is Z.

Impedance is the total opposition to the flow of current and is expressed in ohms.

The below Equation is the mathematical representation of the impedance in an RL circuit.

Impedance in RL Circuits


If a 100 Ω resistor and a 60 Ω Xare in series with a 115V applied voltage (Figure 6), what is the circuit impedance?

Simple RL Circuit

Figure 6 : Simple R-L Circuit


Impedance in RL Circuits

Z = √ (1002 + 602)

Z = √ 13600

Z = 116.6 Ω

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