Electrical Technology, Volume 1

3

Electric Circuit

OBJECTIVES

In this chapter you will learn about:

• The essential ingredients of an electric circuit
• The AND circuit and the OR circuit
• The comparison between an electric circuit and a water circuit
• The difference between a.c. and d.c.
• The concept of electric current and electromotive force
• Safety precautions while working on electric equipment
• Different types of insulators, semiconductors, and conductors used in electrical and electronic engineering and their properties
• Different types of switches and contact materials
• The types of electric circuit
• Ohm’s law and simple connected problems
• The water circuit and the electric circuit — an analogy

Water circuit

The electric circuit

3.1  INTRODUCTION

An electric circuit is ...