Home/ Questions/Q 413153
Next
In Process
Hrishikesh Ram Devan
Asked: 2022-11-04T16:17:41+05:30 In:

When a tuning fork A and B are sounded together,the number of beats heard are 4 per second.When tuning fork A is field,the number of beats heard per second with B is changed to 3.If the frequency of tuning fork B is 384 Hz,the original frequency of A is
A. 388 Hz
B. 387 Hz
C. 381 Hz
D. 380 Hz

When a tuning fork A and B are sounded together,the number of beats heard are 4 per second.When tuning fork A is field,the number of beats heard per second with B is changed to 3.If the frequency of tuning fork B is 384 Hz,the original frequency of A is
A. 388 Hz
B. 387 Hz
C. 381 Hz
D. 380 Hz
Parabola
Leave an answer

Leave an answer

Browse

1 Answer

  1. Correct Answer – D
    `n_(A) = 300 Hz`
    `n_(B) = 384 +- 3 = 387 or 381`
    After filling frequency increases before filling frequency decreases by difference of beat frequency
    `:. n_(A)= 380`

    • 0