EVT F4 Electrical Systems And Components Practice Test

When parts are connected end to end to make a single path for the current, you’re looking at a series circuit. In this setup, the same current flows through every component because there’s only one path for the electrons to take. The total resistance is the sum of the individual resistances, and the voltage from the source is divided among the components, with the voltages adding up to the total supply. A key behavior is that if any component fails open (or is removed), the entire circuit is interrupted and current stops everywhere. This highlights the single-path nature: everything is in line, so the path must remain complete for current to flow. This is different from a parallel circuit, where components are arranged across multiple paths, so each branch can carry current independently. An open circuit is simply a broken path with no current, and a closed circuit indicates a complete path exists, but it doesn’t specify the end-to-end series arrangement.