Which of the following describes the effect on resistance when additional resistors are added in series?

When additional resistors are added in series to a circuit, the total resistance increases. This occurs because each resistor adds its own resistance to the overall circuit path. In a series configuration, the resistors contribute cumulatively to the total resistance, making it higher than any single resistor alone would be.

The total resistance in a series circuit is calculated by simply summing the resistance values of all the resistors. For example, if two resistors of 5 ohms each are connected in series, the total resistance would be 5 ohms + 5 ohms = 10 ohms. This principle is fundamental in electrical theory because it affects how current flows through the circuit. With an increase in resistance, for a given voltage, the overall current in the circuit will decrease according to Ohm's law (I = V/R).

Understanding this concept is crucial for an apprentice lineman as it helps them design and troubleshoot circuits effectively, ensuring that they can predict how changes in resistance will impact the performance of electrical systems.