Regarding the RL series circuit, this article will explain the information below. Equation, magnitude, vector diagram, and impedance phase angle of RL series circuit impedance Impedance of the RL series circuit An RL series circuit (also known as an RL filter or RL network) is an electrical circuit consisting of a resistor \(R\) and an inductor \(L\) connected in series, driven by a voltage source or current source. The impedance \({\dot{Z}}_R\) of the resistor \(R\) and the impedance \({\dot{Z}}_L\) of the inductor \(L\) can be expressed by the following equations: \begin{eqnarray}{\dot{Z}}_R&=&R\\\\{\dot{Z}}_L&=&jX_L=j{\omega}L\end{eqnarray} ,where \({\omega}\) is the angular frequency, which is equal ...