It will be noticed that the
curve rises from zero at first steeply and nearly in a straight line,
then bends over, and then becomes nearly straight again, as it
gradually rises to its limiting value. The first part of the
curve--that relating to the strength of the current after _very small_
interval of time--is the period within which the strength of the
current is governed by inertia (i.e., the self-induction) rather than
by resistance. In reality the current is not governed either by the
self-induction or by the resistance alone, but by the ratio of the
two. This ratio is sometimes called the "time constant" of the
circuit, for it represents _the time_ which the current takes in that
circuit to rise to a definite fraction of its final value.
E = 10
r = 1
R = 100
L = 10
Si
1000 + _..-------------------------------
| . _ _---------
| . .----
| . .- 2 IN SERIES
| . .-
| -
| .: - :
| .: . :
500 | . : __- -:---------------------------
| .
Pages:
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88