Under normal operating conditions, aircraft electrical power is distributed across which two buses?

The correct choice is based on the fundamental design of aircraft electrical systems, particularly in the T-6B. Under normal operating conditions, the aircraft utilizes a generator bus and a battery bus to distribute electrical power. The generator bus is primarily powered by the aircraft's generators, ensuring that essential systems receive reliable power during flight. In contrast, the battery bus provides an alternative power source, drawing from the aircraft's batteries, which is crucial in scenarios where generator power may be lost or inadequate.

By using these two buses, the aircraft can ensure consistent power distribution while maintaining redundancy. This design allows for efficient management of electrical loads and helps to prioritize critical systems in the event of a power failure.

The other options do not align with the standard operating procedures regarding power distribution in the T-6B, focusing instead on components that are either not typically present in the primary power distribution scheme or lack the necessary redundancy provided by the generator and battery buses. Thus, the focus on the generator and battery buses is key to understanding the operational integrity of the aircraft's electrical system.