Question

An ac series circuit contains a 4 resistance and a 3 inductive reactance. what is the impedance of the circuit?

Answer 1

Impendence of a LR circuit = $\sqrt{ R^{2} + L^{2} }$
                       
where , R = Resistance 
             L = inductive reactance

There fore , Z = $\sqrt{ 3^{2} + 4^{2} }$
                       =5.