Question

the frequencies of two turning forks A and B are 250Hz and 255Hz respectively.Both are sounded together . how many beats will be heard in 5 seconds?​

Answer 1

Answer:

Given:

Frequency of 2 tuning forks are

• 250 Hz
• 255 Hz

To find:

Beats heard in 5 seconds.

Concept:

Beat frequency is the frequency of Maxima and Minima heard when 2 close frequency waves are allowed to mix.

$\boxed{beat \: freq. = \mu2 - \mu1}$

Calculation:

Beat frequency = 255 - 250 = 5 Hz.

So number of beats heard in 5 seconds

$= 5 \times 5$

$= 25 \: beats$

So final answer :

$\boxed{\huge{beats \: = 25}}$