Question

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?

a) 2.50 ms
b) 5.00 ms
c) 2.50 µs
d) 250 µs

Answer 1

The time for one complete cycle of 400-Hz AC power is 2.50 milliseconds.

Therefore, the correct answer is 2.50 ms (option a).

Step-by-step explanation:

Military aircraft use 400-Hz AC power, which means it has a frequency of 400 cycles per second. To find the time for one complete cycle, we can use the formula:

So, the time for one complete cycle is:

Therefore, the correct answer is 2.50 ms (option a).

The time for one complete cycle of a frequency is known as the period, and it is the inverse of the frequency. For 400-Hz AC power, used in military aircraft for lighter-weight equipment, the period (T) can be calculated using the formula T = 1 / f, where f is the frequency.

Substituting 400 Hz for f, we get T = 1 / 400 Hz = 0.0025 seconds or 2.5 milliseconds (ms). Therefore, the time for one complete cycle of this power is 2.50 ms, which corresponds to option (a).