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Electrical Technology, Volume 1 by S. P. Bali

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1

Systems of Units

OBJECTIVES

In this chapter you will learn about:

  • Scientific notation for expressing very large and very small quantities
  • The need for a system of units
  • What makes up a system of units
  • The difference between fundamental and derived units
  • The existing standard of units
  • Systems of units
  • SI system of units
  • Definitions of the base units
  • Importance of the SI system
equation
1.1  INTRODUCTION

From the earlier days of civilization, mankind found it necessary to adopt some system of units that would simplify his daily activities of barter, travel, and accumulation of knowledge. When selling, buying or exchanging goods, he had to arrive ...

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