Final answer:
APU starting requires a specific amount of current, measured in amperes, with the exact amperage required depending on the specific APU model and aircraft type. It typically falls within the range of several hundred to a couple of thousand amps.
Step-by-step explanation:
APU (Auxiliary Power Unit) is an electrical power source used to start aircraft engines, provide power to onboard systems, and serve as a backup power supply. APU starting requires a specific amount of current, measured in amperes. The exact amperage required may vary depending on the specific APU model and aircraft type, but it typically falls within the range of several hundred to a couple of thousand amps.