Question

Impedance of LR circuit is

Answer 1

The impedance of series RL Circuit is nothing but the combine effect of resistance (R) and inductive reactance (XL) of the circuit as a whole. The impedance Z in ohms is given by, Z = (R2 + XL2)0.5 and from right angle 

Answer 2

Impedance of LR circuit is $\bold{Z=\left(R^{2}+X_{L}^{2}\right)^{0.5}}$

Explanation:

A LR circuit consists of a inductor and a resistor in it. Where the inductor is denoted by “L” and   the resistance is denoted by “R” . This type of combined circuit is applicable for AC currents and the combined effect of these two values is known as impedance and denoted by “Z” and the value for LR circuit is $Z=\left(R^{2}+X_{L}^{2}\right)^{0.5}$. The impedance is measured from the right angle.