The breaker point assembly functions as an electrical what?

The breaker point assembly in small engine ignition systems functions essentially as a switch. When the engine is running and the ignition coil generates a voltage, the breaker points open and close to control the flow of electricity in the ignition system. When the points are closed, current flows to the ignition coil, which builds up a magnetic field. When the breaker points open, the magnetic field collapses, generating a high-voltage spark needed to ignite the fuel-air mixture in the engine's combustion chamber. This on-off action is what makes the breaker points serve the purpose of a switch, turning the electrical flow on and off rapidly as needed to create the spark.

The other options do not accurately describe the function of the breaker point assembly. A fuse is used to protect the electrical circuit from overloads, a capacitor stores electrical energy for later use, and a resistor limits electrical flow. While these components are essential in various aspects of electrical systems, they do not serve the switching function that is characteristic of the breaker point assembly.