How is the frequency of a wave measured?

How is the frequency of a wave measured?

• the number of seconds the signal takes to complete one up and down cycle
• the number of times the signal makes one complete up and down cycle in 1 second
• the number of times the signal makes one complete up and down cycle in 2 seconds
• the number of seconds the signal takes to complete two up and down cycles

Explanation: The frequency of a wave is measured by counting the number of times the signal makes one complete up and down cycle in a single second.

Exam with this question: Quiz - Wireless Signals and Modulation