What type of electricity is commonly used in large aircraft?

Large aircraft typically use a combination of alternating current (AC) and direct current (DC) systems, making the option of AC/DC the correct choice.

In aviation, AC is often used for systems that require higher power and efficient distribution, such as lighting, avionics, and other onboard equipment. The AC power is usually generated by engine-driven generators or through auxiliary power units (APUs). On the other hand, DC is mainly utilized for battery systems, emergency power, and for specific avionics that operate more efficiently on DC.

This dual use helps to optimize the performance and efficiency of the aircraft's electrical systems. Therefore, having both types of current (AC and DC) is essential for the various functions and components of large aircraft, enabling them to operate effectively and safely.