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11th ICSE
IMPORTANT
Earn 100

In the experiment with Quincke's tube, the tube is displaced through a distance of 30 cm  to obtain two successive maximum sound. If the velocity of sound is 330 m s-1 , find the wavelength and frequency of the sound.

Important Questions on Superposition of Waves-1 : Interference and Beats

HARD
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 30 - Superposition of Waves-1 : Interference and Beats>NUMERICALS>Q 4
The minimum distance through which one tube, in a Quincke's tube, is to be shifted within the other, in order to get two such positions when no sound is heard, is 16.6 cm. Determine the frequency of the source of sound. (Speed of sound in air = 332 m s-1.) 
EASY
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 30 - Superposition of Waves-1 : Interference and Beats>NUMERICALS>Q 5
When two tuning forks are sounded together, the sound of maximum intensity is heard successively at an interval of 0.2 s. Find out the difference in the frequencies of the tuning forks. 
HARD
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 30 - Superposition of Waves-1 : Interference and Beats>NUMERICALS>Q 6
The period of vibration of a tuning fork is 1288 second. When it is sounded with another tuning fork, 8 beats per second are produced. Determine the possible frequencies of the other fork.
MEDIUM
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 30 - Superposition of Waves-1 : Interference and Beats>NUMERICALS>Q 7
The frequencies of two sound-sources are 512 and 516 Hz. What will be the time-interval between two consecutive beats produced by sounding them together?
HARD
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 30 - Superposition of Waves-1 : Interference and Beats>NUMERICALS>Q 8
Two tuning forks, on sounding together, produce 3 beats per second. The frequency of one is 256 Hz. On loading the other with a small wax, the number of beats per second becomes 5. What is the frequency of the other fork?
MEDIUM
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 30 - Superposition of Waves-1 : Interference and Beats>NUMERICALS>Q 9
Two tuning forks A and B are in unison. The frequency of B is 256 Hz. When the prongs of A are scraped by a file and sounded with B, then 4 beats per second are heard. What is the frequency of A after scraping?
HARD
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 30 - Superposition of Waves-1 : Interference and Beats>NUMERICALS>Q 10
Two tuning forks produce 5 beats per second. The frequency of one is 256 Hz. When some wax is put on the prongs of the other one, the beats disappear. Find the frequency of the second fork.
MEDIUM
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 30 - Superposition of Waves-1 : Interference and Beats>NUMERICALS>Q 11

Two tuning forks A and B are sounded together. The beats produced are shown by the straight line OQ in the graph. After putting wax on the tuning fork B, they are sounded together again. The beats produced are shown by the straight line OR. If the frequency of the tuning fork A is 341 hertz, Calculate the frequency of the tuning fork B.

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