मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान इयत्ता ११

When two waves of almost equal frequencies n1 and n2 reach at a point simultaneously, what is the time interval between successive maxima? - Physics

Advertisements
Advertisements

प्रश्न

When two waves of almost equal frequencies n1 and n2 reach at a point simultaneously, what is the time interval between successive maxima?

टीपा लिहा
Advertisements

उत्तर

If two waves of almost equal frequencies interfere, they are producing beats.

Let n1 > n2

Beat frequency `f_"beat"` = n1 – n2

∴ Time periods of beats Tbeats = `1/f_"beat" = 1/(n_1 - n_2)`

This time period will be equal to the time interval between successive maxima.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 15: Waves - Exercises [पृष्ठ ११०]

APPEARS IN

एनसीईआरटी एक्झांप्लर Physics [English] Class 11
पाठ 15 Waves
Exercises | Q 15.24 | पृष्ठ ११०

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

Wavelengths of two notes in the air are`[70/153]^m` and `[70/157]^m`. Each of  these notes produces 8 beats per second with a tuning fork of fixed frequency. Find the velocity of sound in the air and frequency of the tuning fork.


Explain why (or how) A violin note and sitar note may have the same frequency, yet we can distinguish between the two notes,


In Doppler effect of light, the term “red shift” is used for ______.

(A) frequency increase

(B) frequency decrease

(C) wavelength decrease

(D) frequency and wavelength increase


A set of 8 tuning forks is arranged in a series of increasing order of frequencies. Each fork gives 4 beats per second with the next one and the frequency of last fork is twice that of the first. Calculate the frequencies of the first and the last fork.


What are beats?


Explain the production of beats and deduce analytically the expression for beats frequency.


When the observer moves towards the stationary source with velocity, 'V1', the apparent frequency of the emitted note is 'F1'. When the observer moves away from the source with velocity 'V1', the apparent frequency is 'F2'. If 'V' is the velocity of sound in air and `"F"_1/"F"_2 = 4` then `"V"/"V"_1 = ?`


For formation of beats, two sound notes must have ______.


A set of 25 tuning forks is arranged in order of decreasing frequencies. Each fork produces 3 beats with succeeding one. If the first fork is octave of last, then the frequency of 1st and 15th fork in Hz is ______.


Two tuning forks have frequencies 380 Hz and 384 Hz respectively. When they are sounded together, maximum sound is heard. How long will it take to hear the minimum sound?


A set of 56 tuning forks are arranged in series of increasing frequencies. If each fork gives 4 beats with preceding one and the frequency of the last is twice than than that of first, then frequency of the first fork is ____________.


A pipe closed at one end has a length of 1m and at its open end, 0.25 m long uniform string is vibrating in its third harmonic and resonates with a fundamental frequency of pipe. If the tension in the string is 100 N and the speed of sound is 340 `m/s`, then the mass of the string is near ______ 


A pipe open at both ends has a length of 1m. The air column in the pipe can not resonate for a frequency (Neglect end correction, speed of sound in air = 340 m/s)


Two identical wires are vibrating in unison. If the tension in one of the wires is increased by 2%, five beats are produced per second by the two vibrating wires. The initial frequency of each wire is ______

`(sqrt(1 . 0.2) ≑ 1 . 0.1)`


Two wires are producing fundamental notes of the same frequency. Change in which of the following factors of one wire will NOT produce beats between them?


The frequency of two tuning forks A and B are 1.5% more and 2.5% less than that of the tuning fork C. When A and B are sounded together, 12 beats are produced in 1 second. The frequency of tuning fork C is ______ 


Prove that the frequency of beats is equal to the difference between the frequencies of the two sound notes giving rise to beats.


Two tuning forks of frequencies 320 Hz and 340 Hz are sounded together to produce a sound wave. The velocity of sound in air is 326.4 m/s. Calculate the difference in wavelengths of these waves.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×