SOLUTIONS MANUAL
Electrical Engineering: Principles & Applications 7th Edition
by Allan Hambley
M
PR
ES
SI
VE
G
R
AD
ES
, Chapter 1 Introduction
IM
PR
ES
SI
VE
Study of this chapter will enable you to:
Recognize interrelationships between electrical engineering and other fields of science and
engineering.
G
List the major subfields of electrical engineering.
List several important reasons for studying electrical engineering.
R
Define current, voltage, and power, including their units.
Calculate power and energy and determine whether energy is supplied or absorbed by a circuit
AD
element.
State and apply Kirchhoff’s current and voltage laws.
Recognize series and parallel connections.
Identify and describe the characteristics of voltage and current sources.
ES
State and apply Ohm’s law.
Solve for currents, voltages, and powers in simple circuits.
Introduction to this chapter:
, In this chapter, we introduce electrical engineering, define circuit variables (current,
voltage, power, and energy), study the laws that these circuit variables obey, and
meet several circuit elements (current sources, voltage sources, and resistors).
IM
PR
ES
SI
VE
G
R
AD
ES
, 1.1 Overview of Electrical Engineering
Electrical engineers design systems that have two main objectives:
IM
1. To gather, store, process, transport, and present information.
2. To distribute, store, and convert energy between various forms.
PR
In many electrical systems, the manipulation of energy and the manipulation of information are
interdependent.
ES
For example, numerous aspects of electrical engineering relating to information are applied in weather
prediction. Data about cloud cover, precipitation, wind speed, and so on are gathered electronically by
weather satellites, by land-based radar stations, and by sensors at numerous weather stations.
(Sensors are devices that convert physical measurements to electrical signals.) This information is
SI
transported by electronic communication systems and processed by computers to yield forecasts that
are disseminated and displayed electronically.
VE
In electrical power plants, energy is converted from various sources to electrical form. Electrical
distribution systems transport the energy to virtually every factory, home, and business in the world,
where it is converted to a multitude of useful forms, such as mechanical energy, heat, and light.
G
No doubt you can list scores of electrical engineering applications in your daily life. Increasingly,
electrical and electronic features are integrated into new products. Automobiles and trucks provide just
R
one example of this trend. The electronic content of the average automobile is growing rapidly in
value. Self-driving vehicles are in rapid development and will eventually become the norm. Auto
AD
designers realize that electronic technology is a good way to provide increased functionality at lower
cost. Table 1.1 shows some of the applications of electrical engineering in automobiles.
Table 1.1 Current and Emerging Electronic/Electrical Applications in Automobiles and Trucks
ES
Safety
Antiskid brakes
Inflatable restraints
Collision warning and avoidance
Electrical Engineering: Principles & Applications 7th Edition
by Allan Hambley
M
PR
ES
SI
VE
G
R
AD
ES
, Chapter 1 Introduction
IM
PR
ES
SI
VE
Study of this chapter will enable you to:
Recognize interrelationships between electrical engineering and other fields of science and
engineering.
G
List the major subfields of electrical engineering.
List several important reasons for studying electrical engineering.
R
Define current, voltage, and power, including their units.
Calculate power and energy and determine whether energy is supplied or absorbed by a circuit
AD
element.
State and apply Kirchhoff’s current and voltage laws.
Recognize series and parallel connections.
Identify and describe the characteristics of voltage and current sources.
ES
State and apply Ohm’s law.
Solve for currents, voltages, and powers in simple circuits.
Introduction to this chapter:
, In this chapter, we introduce electrical engineering, define circuit variables (current,
voltage, power, and energy), study the laws that these circuit variables obey, and
meet several circuit elements (current sources, voltage sources, and resistors).
IM
PR
ES
SI
VE
G
R
AD
ES
, 1.1 Overview of Electrical Engineering
Electrical engineers design systems that have two main objectives:
IM
1. To gather, store, process, transport, and present information.
2. To distribute, store, and convert energy between various forms.
PR
In many electrical systems, the manipulation of energy and the manipulation of information are
interdependent.
ES
For example, numerous aspects of electrical engineering relating to information are applied in weather
prediction. Data about cloud cover, precipitation, wind speed, and so on are gathered electronically by
weather satellites, by land-based radar stations, and by sensors at numerous weather stations.
(Sensors are devices that convert physical measurements to electrical signals.) This information is
SI
transported by electronic communication systems and processed by computers to yield forecasts that
are disseminated and displayed electronically.
VE
In electrical power plants, energy is converted from various sources to electrical form. Electrical
distribution systems transport the energy to virtually every factory, home, and business in the world,
where it is converted to a multitude of useful forms, such as mechanical energy, heat, and light.
G
No doubt you can list scores of electrical engineering applications in your daily life. Increasingly,
electrical and electronic features are integrated into new products. Automobiles and trucks provide just
R
one example of this trend. The electronic content of the average automobile is growing rapidly in
value. Self-driving vehicles are in rapid development and will eventually become the norm. Auto
AD
designers realize that electronic technology is a good way to provide increased functionality at lower
cost. Table 1.1 shows some of the applications of electrical engineering in automobiles.
Table 1.1 Current and Emerging Electronic/Electrical Applications in Automobiles and Trucks
ES
Safety
Antiskid brakes
Inflatable restraints
Collision warning and avoidance
