Question

the frequency of two tuning forks A and B are 250 Hz and 255 Hz respectively. both are sounded together .how many beats will be heard in 5 s?

Answer 1

1 beat per 5 second will be heard.

Solution:

The two tuning forks sounded together with their respective frequencies produce the following number of beats –

Given: Frequency $f_{1}$ = 250 Hz

             Frequency $f_{2}$  = 255 Hz

As the beat frequency is difference in frequency of waves, the formula is given by

              Beat frequency = $f_{2}-f_{1}$  = 255 -250 = 5 Hz

Number of beats in 5 sec =$\bold{\frac{\text {Beat frequency}}{\text {time}}}$

Number of beats = $\frac{5}{5}$

Number of beat = 1  

Answer 2

Answer:

Beat frequency=It is the number of beats produced per second.

It is numerically equal to the difference between the frequencies of the superimposing waves

So beat produced in one second =255-250=5hz

beat produced in 5 second =5×5 =25hz

Explanation: