Basic Electrical and Electronics Engineering

2

DC Networks and Network Theorems

TOPICS DISCUSSED

• Circuit and circuit elements

• Voltage and current sources

• Series and parallel circuits; Kirchhoff’s laws

• Superposition theorem

• Thevenin’s theorem

• Norton’s theorem

• Millman’s theorem

• Maximum power transfer theorem

• Star-delta transformation of resistances

• Transients in R–L and R–C circuits

2.1 Introduction

A network is an interconnection of elements, components, input signals, and output signals. The networks are of two types, viz active network and passive network. An active network contains one or more sources of supply whereas a passive network does not contain any source of supply voltage or current.

There are three basic components of a circuit or a network, viz resistor, capacitor, ...