Electrostatics and circuits belong to one science not two. For a unified approach to learning Current and the process of conduction watch these two videos i. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-TTtt28b1dYo.html and ii. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-8BQM_xw2Rfo.html Also, in the textbooks referred in the last frame of video i you will find descriptions of the electric and magnetic field, operation of resistors, capacitors and inductors using a unified approach which makes it easier to understand the operation of circuits with these elements. There are also a chapter in the textbook references 'Fundamentals of electric theory and circuits' the operation of transmission lines using the unified approach.