Question

How do I solve the 7th qn?

Answer 1

Answer:

Home / Try this! Three sound waves of equal amplitudeshave frequencies (n - 1), n,(n + 1). They superimpose to give beats. The number of beats produced per second will be

Three sound waves of equal amplitudes have frequencies (n - 1), n, (n + 1). They superimpose to give beats. The number of beats produced per second will be

Option 1) 1 Option 2) 4 Option 3) 3 Option 4) 2

Answers (1)

Beat Frequency -

deltau=left|u1-u2ight|

module of

left|u1-u2ight|

- wherein

where

u1: and :u2

are frequency of two wave differ slightly in value of frequency.

Beats produced is max difference two wave frequency

(1) and (2) x-(x-1) =1

(2) and (3) (x+1) -x = 1

(1) and (3) (x+1) (x-1) = 2

Option 1)

1

Incorrect option

Option 2)

4

Incorrect option

Option 3)

3

Incorrect option

Option 4)

Therefore option 2 is correct answer

Explanation:

by giving answer for your question,you can solve the 7th question by your hand