Basic DC Theory
BASIC DC CIRCUIT CALCULATIONS
IT = I1 + I2
I2 = IT - I1
I2 = 30 - 22
I2 = 8 amps
Example 3:
A parallel circuit consists of R1 = 15W, R2 = 20W and R3 = 10W, with an applied
voltage of 120 V (Figure 25). What current will flow through each branch?
Figure 25 Example 3 Parallel Circuit
I1
V
R1
120
15
8A
I2
V
R2
120
20
6A
I3
V
R3
120
10
12A
IT
I1
I2
I3
IT
8A
6A
12A
IT
26A
Rev. 0
Page 31
ES-02
