If the current in an AC circuit completes a cycle in 0.1 seconds, what is the frequency of the AC?

To determine the frequency of an alternating current (AC) circuit, you can use the relationship between the period of the wave and its frequency. The frequency (in hertz) is the reciprocal of the period (in seconds) measured in cycles per second. The formula to calculate frequency is:

[ \text{Frequency (Hz)} = \frac{1}{\text{Period (seconds)}} ]

In this scenario, the period is given as 0.1 seconds. When you apply the formula:

[ \text{Frequency} = \frac{1}{0.1} = 10 \text{ Hz} ]

This means that the AC current completes 10 cycles in one second. Thus, the frequency of the AC circuit is correctly identified as 10 Hz. Understanding this relationship helps in grasping how AC circuits function and how frequency is measured, which is a fundamental concept in electronics and radio communication.