D.G. circuit analysis

Abstract

This chapter presents the DC circuit analysis. The laws that determine the currents and voltage drops in DC networks are Ohm's law; the laws for resistors in series and in parallel; and Kirchhoff's laws. There are a number of circuit theorems that have been developed for solving problems in dc electrical networks. These include the superposition theorem, the Thevenins theorem, the Norton's theorem, and the maximum power transfer theorem. Varying a load resistance to be equal, or almost equal to the source internal resistance is called resistance matching. Examples where resistance matching is important include coupling an aerial to a transmitter or receiver, or in coupling a loudspeaker to an amplifier where coupling transformers may be used to give maximum power transfer.