Question:
forks are arranged in increasing order of frequency in such a way that any two nearest tuning forks produce beats/sec. The highest frequency is twice of the lowest. Possible highest and the lowest frequencies (in ) are
forks are arranged in increasing order of frequency in such a way that any two nearest tuning forks produce beats/sec. The highest frequency is twice of the lowest. Possible highest and the lowest frequencies (in ) are
Updated On: Jan 30, 2025
- 80 and 40
- 100 and 50
- 44 and 22
- 72 and 36
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The Correct Option is D
Solution and Explanation
Using
where Number of tuning forks in series
beat frequency between two successive forks
where Number of tuning forks in series
beat frequency between two successive forks
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Top Questions on beats
- The displacement equations of sound waves produced by two sources are given by: and , where is time in seconds. If the waves are produced simultaneously, the number of beats produced per minute is:
- Two tuning forks A and B produce 4 beats/sec. Forks B and C produce 5 beats/sec. Forks A and C may produce ??. beats/sec
- Two sources of sound placed close to each other, are emitting progressive waves given by and An observer located near these two sources of sound will hear
- Two identical piano wires have a fundamental frequency of cycle per second when kept under the same tension. What fractional increase in the tension of one wires will lead to the occurrence of beats per second when both wires vibrate simultaneously?
- A band playing music at a frequency f is moving towards a wall at a speed . A motorist is following the band with a speed . If v be the speed of the sound, the expression for beat frequency heard by motorist is
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Questions Asked in BITSAT exam
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- The angle between the lines whose direction cosines are given by the equations and is:
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Concepts Used:
Beats
What is Beat Frequency?
Let’s see from fig.m, the frequency of a pink-colored wave is f1, and that of a green-colored wave is f2. So, the frequency of the beat is the difference between these two, which is:
fBEATS = |f1 - f2|
Interference and Beats
When two or more waves travelling in a medium meet, the resulting phenomenon is called interference and beats are an excellent example of the phenomenon of interference.
What is Interference?
When two or more waves travelling in a medium meet, the resulting phenomenon is called interference and beats are an excellent example of the phenomenon of interference.
The Application of Beats:
- Beats are used in determining the unknown frequency
- Beats are used in determining the existence of poisonous gases in mines.