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Newnes Circuit Calculations Pocket Book
book

Newnes Circuit Calculations Pocket Book

by Thomas J. Davies
April 2016
Intermediate to advanced content levelIntermediate to advanced
384 pages
12h 56m
English
Newnes
Content preview from Newnes Circuit Calculations Pocket Book
d.c.
transients
155
Figure
9.10
Voltage
(V)
Time
(s)
(a)
Current (A)
Time
(s)
(b)
156 Circuit calculations pocket book
V 100
(.) /
i = 7(1 -
t~
,RIL
)
0.5 = 2.5(1 -
e~
tRIL
)
0.5 = 2.5 - 2.5e"'*
/L
2.5e~
,R/L
= 2.5 - 0.5 = 2.0
2.5
Transposing
-=0.8
1
-tRIL
= 0.8
5'*"- = = 1.25
0.8
e
10
' = 1.25 since - = 10
10r = log
e
1.25 = 0.223
t = 0.0223 s
(iii) j = 2.5(1 -
e
-°-
4x
^
4
))
= 2.5(1 - e-
4
)
= 2.5^1 - ~j = 2.5 x 0.982 = 2.45 A
10 PRINT "PROG 127"
20 PRINT "TIME AND CURRENT"
30 INPUT "ENTER APPLIED VOLTAGE" ; V
40 INPUT "RESISTANCE IN OHMS" ; R
50 INPUT
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Publisher Resources

ISBN: 9781483101132