Military aircraft use 400-Hz AC power, because it is possible to design lighter-weight equipment at this higher frequency. What is the time for one complete cycle of this power?

Video Transcript

This is College Physics Answers with Shaun Dychko. The period of AC current in military aircraft is going to be the reciprocal of the frequency. So that's one over 400 Hertz which is 0.003 seconds or 3.00 milliseconds.