Question

A tuning fork vibrates with $2$ vibrations in $0.4s$. Its frequency is:

• A. $5Hz$
• B. $6Hz$
• C. $8Hz$
• D. $0.8Hz$

Answer 1

Answer: (A)

$5Hz$

Frequency is defined as the number of vibrations per second.

Given,

A tuning fork vibrates with $2$ vibrations in $0.4s$.

Number of vibrations $=2$

Time $=0.4s$

Frequency, $f=\frac{numberofvibrations}{time}$

$f=\frac{2}{0.4}$

$f=5Hz$