Basic DC Theory
DC CIRCUIT ANALYSIS
The easiest way to solve these types of circuits is to do it in steps.
Figure 46 Redrawn Circuit Example
Step 1:
Find the equivalent resistance of the parallel branch:
Rp =
R2R3
R2
R3
(6)(12)
6
12
72
18
4W
Step 2:
Find the resistance of the equivalent series circuit:
RT = R1 + RP = 4W + 4W = 8W
Step 3:
Find total current (IT):
IT =
V
RT
60 V
8W
7.5 amps
Rev. 0
Page 59
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