April 2016
Intermediate to advanced
384 pages
12h 56m
English
Content preview from Newnes Circuit Calculations Pocket Book
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Network theorems 83
7,-/2
A
+
2a
he
4ft
+
4V
B
Figure
4.67
he
= /i " h = 2 - 1 = 1 A
Removing the two sources in Figure 4.67 and looking in at a break
between A and B the resistance is
2x4
= 1.333 ft
2 + 4
Norton's equivalent circuit is shown in Figure 4.68. The current will
divide between the two branches in the ratio 1.333 : 8.
1 x 1.333
Current / in the 8 ft = = 0.142 A
8 + 1.333
The circuit is identical to Figure 4.10 and confirms the answer
shown in Figure 4.11.
Figure
4.68
4.5
Maximum power transfer
Maximum power is transferred from a source of
e.m.f.
to a load,
when the load resistance equals the internal resistance of the source.
Example ...
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