Home
Class 12
PHYSICS
Two tuning fork when sounded together, p...

Two tuning fork when sounded together, produce 3 `beats//s`. One of the fork is in unison with `27 cm` length of sonometer wire and other with `28 cm` length of the same wire. The frequencies of the two tuning forks are

A

`87 , 84 Hz`

B

`49, 39 Hz`

C

`81, 78 Hz`

D

`84, 81 Hz`

Text Solution

Verified by Experts

The correct Answer is:
D
`n_(1) - n_(2) = 3 "……."(i)`
`n prop (1)/(l)`
`n_(1)l_(1) = n_(2)l_(2)`
`(n_(1))/(n_(2)) = (28)/(27)"…."(2)`
Solving these two equation
`n_(1) = 84 , n_(2) = 81`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

When two timing forks are sounded together, 4 beats per second are heard. One of the forks is in unison with 0.96 m length of a sonometer wire and the other is in unison with 0.97 m length of the same wire. Calculate the frequency of each

A tuning fork A sounded together with another fork B produces 5 beats/s. Fork A is in unison with 0.95 m length of a sonometer and fork B is in unison with 0.98 m length of the sonometer wire. Find the frequency of forks A and B.

Knowledge Check

  • Two forks A and B when sounded together produce four beats s^(-1) . The fork A is in unison with 30 cm length of a sonometer wire and B is in unison with 25 cm length of the same wire at the same tension. The frequencies of the forks are

    A
    24 Hz, 28 Hz
    B
    20 Hz, 24 Hz
    C
    16 Hz, 20 Hz
    D
    26 Hz, 30 Hz

  • Two tuning forks when sounded together produce one beat per 0.4 s. Then the difference of their frequencies is

    A
    1 Hz
    B
    1.5 Hz
    C
    2 Hz
    D
    2.5 Hz

  • Two tuning forks when sounded together produced 4beats//sec . The frequency of one fork is 256. The number of beats heard increases when the fork of frequency 256 is loaded with wax. The frequency of the other fork is

    A
    `504 Hz`
    B
    `520 Hz`
    C
    `260 Hz`
    D
    `252 Hz`

    • Similar Questions

    Explore conceptually related problems

    Two tuning forks A and B produce 4 beats//s when sounded together . A resonates to 32.4 cm of stretched wire and B is in resonance with 32 cm of the same wire . Determine the frequencies of the two tuning forks .

    Two tuning frok when sounded together give 4 beats per second.One is in unison with a length of 96 cm of a sonometer wire under a certain tension and the with 97 cm of the same wire under tension.Find the frequencies of the forks

    Two tuning forks when sounded together produce 5 beats per second. A sonometer wire of length 0.24 m is in unison with one of the forks. When the length of the wire is increased by 1 cm, it is unison with the other fork. Find the frequencies of the tuning forks.

    Two tuning forks when sounded together produce 4 beats per second. The first produces 8 beats per second. Calculate the frequency of the other.

    Two tuning forks when sounded together produce 5 beats per second. The frequency of one of them is 250 Hz. When the other fork is slightly loaded, they produce 7 beats/s. Then the frequency of other tuning fork without loading is

    Home
    Profile