Explain the function of the ignition coil and how coil-on-plug differs from distributor-based ignition.

• A. The ignition coil converts low voltage to high voltage to create a spark; coil-on-plug delivers an individual coil for each cylinder with no distributor, while distributor-based ignition uses a single coil and a distributor cap/rotor.
• B. The ignition coil converts high voltage to low voltage; coil-on-plug uses a distributor to route spark, while distributor-based ignition uses individual coils per plug.
• C. The ignition coil filters fuel before combustion; coil-on-plug and distributor-based ignition are identical.
• D. The ignition coil is only used for idle speed control and has no role in spark timing.

Answer: (A)