... Perspective
Electrical Safety
At the beginning of this chapter, we said that current through the body can
cause injury. Let's examine this aspect of electrical safety.
You might think that electrical ... level is not the sole
RSPECWE
determinant of potential injury due to electrical
shock, consider the case of a static electricity shock
mentioned in the Practical Perspective at t...
...
After introducing the techniques for analyzing the natural and step
responses of first-order circuits, we discuss some special cases of interest.
The first is that of sequential switching, ... that
is,
we have a natural-response problem.
RL and RC circuits are also known as first-order circuits,
because their voltages and currents are described by first-order
differential equation...
... of this example, it is important to point out that safety analysis is an
essential part of an electrical engineer's work.
Now that we have modeled the controls for the hair dryer, let's ...
Recall from Chapter 4 that certain systems—for example, those that trans-
mit information via electric signals—depend on being able to transfer a
maximum amount of power from the source to
... Distribution
of
Electric Power
In this chapter we introduce circuits that are designed to
handle large blocks of electric power. These are the circuits
that are used to transport electric power ... considering only balanced circuits.
The analysis of unbalanced three-phase circuits, which you will
encounter if you study electric power in later courses, relies heav-
ily on an u...
...
M
Practical Perspective
Transient Effects
As we learned in Chapter 9, power delivered from electrical
wall outlets in the U.S. can be modeled as a sinusoidal volt-
age or current source,
... for
a)
= 0; Fig. 14.28(c) presents the equivalent circuit for
to
= 00. In
both equivalent circuits, the output voltage is defined over an effective
open circuit, and thus the output and
... specifications.
558
Active Filter Circuits
Up to this point, we have considered only passive filter circuits,
that is, filter circuits consisting of resistors, inductors, and capaci-
tors.
There ...
Component scale factors •
15,2 Scaling
In the design and analysis of both passive and active filter circuits, working
with element values such as 1 ft, 1 H, and 1 F is convenient. Alt...