文档介绍：1 Introduction
OBJECTIVES Meter
After studying this chapter, you will be Newton
able to Pictorial Diagram
• describe the SI system of measurement, Power of Ten Notation
• convert between various sets of units, Prefixes
• use power of ten notation to simplify Programming Language
handling of large and small numbers, Resistance
• express electrical units using standard Schematic Diagram
prefix notation such as mA, kV, mW, etc., Scientific Notation
• use a sensible number of significant dig- SI Units
its in calculations,
Significant Digits
• describe what block diagrams are and
SPICE
why they are used,
Volt
• convert a simple pictorial circuit to its
schematic representation, Watt
• describe generally puters fit in
the electrical circuit analysis picture. OUTLINE
Introduction
KEY TERMS The SI System of Units
Ampere Converting Units
Block Diagram Power of Ten Notation
Circuit Prefixes
Conversion Factor Significant Digits and Numerical Accuracy
Current Circuit Diagrams
Energy Circuit Analysis puters
Joule
n electrical circuit is a system of ponents such as resis- CHAPTER PREVIEW
Ators, capacitors, inductors, voltage sources, and so on. The electrical behav-
ior of ponents is described by a few basic experimental laws. These
laws and the principles, concepts, mathematical relationships, and methods of
analysis that have evolved from them are known as circuit theory.
Much of circuit theory deals with problem solving and numerical analysis.
When you analyze a problem or design a circuit, for example, you are typically
required pute values for voltage, current, and power. In addition to a
numerical value, your answer must include a unit. The system of units used for
this purpose is the SI system (Systéme International). The SI system is a unified
system of metric measurement; it passes not only the familiar MKS
(meters, kilograms, seconds) units for length, mass, and time, but also units for
electrical a