Which component provides electrical power in the Cessna 172?

In the Cessna 172, the primary component that provides electrical power during flight is the alternator. The alternator is designed to convert mechanical energy from the aircraft's engine into electrical energy. This is crucial for powering the aircraft's electrical systems, including avionics, lights, and other electrical accessories while the engine is running.

While the battery serves as a backup power source and is essential for starting the engine, it does not provide continuous power during operation. The generator is an older technology that was used in earlier aircraft models but has largely been replaced by alternators due to their higher efficiency and reliability. An inverter is used to convert DC power from the battery to AC power but does not directly generate electrical power for the aircraft systems.

The alternator's continuous output ensures that all electrical systems function properly, especially during flight when engine RPM is high, providing a steady supply of power. Understanding the role of the alternator in the Cessna 172 is vital for both operational knowledge and troubleshooting electrical issues.