Page 27 - Basic Electrical Engineering

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Basic Concepts, Laws, and Principles

TOPICS DISCUSSED

The need to study electrical and electronics engineering
Behaviour of materials as conductors, semiconductors, and insulators
Concept of current, resistance, potential, and potential difference
Differences between electric field and magnetic field
Ohm’s law
Effect of temperature on resistance
Electromagnetism and electromagnetic induction
Laws of electromagnetic induction
Dynamically and statically induced EMF
Self and mutual inductance
Electrical circuit elements

1.1 INTRODUCTION
We see applications of electricity all around us. We observe the presence of

electricity in nature. It is indeed amazing as well as interesting to know how
mankind has been able to put electricity for its use. All electronic and

electrical products operate on electricity. Be it your computer system, cell
phones, home entertainment system, lighting, heating, and air-conditioning

systems—all are examples of applications of electricity. Application of
electricity is limitless and often extends beyond our imagination.

Electrical energy has been accepted as the form of energy which is clean
and easy to transmit from one place to the other. All other forms of energy