Recreational Vehicle (RV) Technician Practice Test

In an electrical context, what does a switch control?

1. Voltage levels

2. Current flow

3. Power consumption

4. Resistance

The correct answer is: Current flow

A switch is a fundamental component in electrical circuits that primarily serves to control the flow of current. When a switch is open, it interrupts the path through which current flows, effectively stopping the current from reaching the components downstream. Conversely, when a switch is closed, it completes the circuit and allows current to flow freely. Understanding this function is crucial for troubleshooting and designing electrical systems, particularly in RV setups where switches may control various systems such as lights, appliances, and other electrical devices. The role of a switch is not directly to manage voltage levels, power consumption, or resistance; rather, it specifically allows or stops the current from flowing through the circuit, making it a vital component for controlling electrical power delivery to devices.