BASIC DC CIRCUIT CALCULATIONS
Basic DC Theory
Example:
What value of resistance must be added, in parallel, with an 8W resistor to provide
a total resistance of 6W (Figure 28)?
Figure 28 Example Parallel Circuit
Solution:
RX
RRT
R
RT
(8)(6)
8
6
48
2
24W
Voltage Divider
A voltage divider, or network, is used when it is necessary to obtain different values of voltage
from a single energy source. A simple voltage divider is shown in Figure 29. In this circuit,
24 volts is applied to three resistors in series. The total resistance limits the current through the
circuit to one ampere. Individual voltages are found as follows using equation (2-12).
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