PRINCIPLES OF ELECTRONICS FOR ENGINEERING EXAMINATIONS

CONTENTS

1.Introductions
Electronics-Atomic structure-structure of elements-The electrons-Energy of an electron-Valence electrons-Free electrons-Voltage source-Constant voltage source-Constant current source-Conversion of voltage source into current source-Maximum power transfer-Thevinin's theorem-Norton's theorem-Chassis and ground.

1.1 Electronics

The branch engineering which deals with current conductions through a vacuum or gas or semiconductor is known as electronics.

1.2 Atomic Structure

According to the modern theory, matter is electrical in nature. All the materials are composed by very small particles called atoms.The atoms are the building bricks of all matter. An atom consists of a central nucleus of positive charge around which small negatively charged particles, called electrons revolve in different paths or orbits.