Question 22
WavesThe diagram above shows two waveforms X and Y. If the frequency of X is 30 Hz, what is the frequency of Y?
- A.12 Hz
- B.19 Hz
- C.60 Hz
- D.75 Hz
Show the answer and explanation
Answer: D (75 Hz)
Explanation
In the same time Y completes 2½ waves while X completes one, so fY = 2.5 × 30 = 75 Hz.