What is the purpose of breaker points in an ignition system?

The purpose of breaker points in an ignition system is to open and close circuits. Breaker points function as an electromechanical switch that opens and closes the electrical circuit in the ignition system, allowing current to flow to the ignition coil and generate a spark at the spark plug. When the points are closed, current flows, and when they open, it interrupts the circuit, causing the collapse of the magnetic field in the ignition coil. This collapsing field induces a high voltage in the coil, which then travels to the spark plug to ignite the air-fuel mixture in the engine.

This function is crucial for the operation of gasoline engines, as it controls the timing and delivery of the spark. The precision in the timing of how the points open and close directly affects engine performance. In contrast, other options pertain to different aspects of electrical or mechanical functions but do not accurately describe the role of breaker points in ignition systems.