Question

The number of crests passing a given point in one second is (where T is time period and $v$ is frequency)

• A. T
• B. $v$
• C. 2T
• D. $2v$

Answer 1

The correct option is B

$v$

Explanation:

1. Frequency is defined as the number of vibrations per unit of time and in one vibration one wave crest passes through a particular point.
2. So the number of wave crests passing a given point per unit time is called frequency.
3. Therefore, the number of crests passing a given point in one second is $v$.

Hence, option (b) is correct.