Basic DC Theory
DC CIRCUIT TERMINOLOGY
A closed circuit (Figure 13) is an uninterrupted, or unbroken, path for current from the source
Figure 13 Closed Circuit
(EMF), through the load, and back to the source.
An open circuit, or incomplete circuit, (Figure 14) exists if a break in the circuit occurs; this
prevents a complete path for current flow.
Figure 14 Open Circuit