Final answer:
One advantage of using AC electrical power in aircraft is that it allows for the use of lighter-weight equipment.
Step-by-step explanation:
One advantage of using AC electrical power in aircraft is that it allows for the use of lighter-weight equipment. Military aircraft, for example, use 400-Hz AC power because at this higher frequency, lighter-weight equipment can be designed. This is important for aircraft where weight is a crucial factor in terms of efficiency and performance.