BASIC DC CIRCUIT CALCULATIONS
Basic DC Theory
Figure 20 Voltage Total in a Series Circuit
To find the total voltage across a series circuit, multiply the current by the total resistance as
shown in equation (2-5).
VT = IRT
A series circuit has a 50W, a 75W, and a 100W resistor in series (Figure 21). Find
the voltage necessary to produce a current of 0.5 amps.