Which instrument is operated electrically?

The Turn Coordinator is the instrument that is operated electrically. It relies on an internal gyroscope, which is powered by an electric motor. This gyroscopic action allows the Turn Coordinator to accurately display the rate of turn as well as whether the aircraft is in coordinated flight.

Electric operation is crucial for the Turn Coordinator as it needs to maintain a consistent and reliable reading of the aircraft's turning performance, especially in various flight conditions. The rapid rotation of the gyroscope, combined with an electric supply, ensures that the readings are timely and accurate for the pilot's situational awareness.

In contrast, the Altimeter, Air Speed Indicator, and Vertical Speed Indicator primarily depend on static and dynamic air pressure. These instruments use mechanical means to sense changes in air pressure and do not require electricity to function. Understanding the operational principles of these instruments is essential for pilots, as it helps them rely on the correct information during flight.