EASY
Physics
IMPORTANT
Earn 100

nth harmonic of a closed organ pipe is equal to mth harmonic of an open pipe. First overtone frequency of the closed organ pipe is also equal to first overtone frequency of the open organ pipe. Find the value of n, if m = 6.

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Important Questions on Superposition and Standing Waves

MEDIUM
Physics
IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 7 - Superposition and Standing Waves>Exercises>Q 9
A glass tube of 1.0 m length is filled with water. The water can be drained out slowly at the bottom of the tube. A vibrating tuning fork of frequency 500 Hz is brought at the upper end of the tube and the velocity of sound is 300 ms-1. Find the number of resonances that can be obtained.
HARD
Physics
IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 7 - Superposition and Standing Waves>Exercises>Q 10
A 40 cm long wire having a mass 3.2 g and area of cross-section 1 mm2 is stretched between the support 40.05 cm apart. In its fundamental mode, it vibrates with a frequency 100064 Hz. The Young's modulus of the wire in×109 N m-2 is___
MEDIUM
Physics
IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 7 - Superposition and Standing Waves>Exercises>Q 11
A bat emits the ultrasonic sound of frequency 1000 kHz in air. If the sound meets a water surface, it gets partially reflected back and partially refracted (transmitted) in water. What would be the difference of wavelength transmitted to wavelength reflected (speed of sound in air =330 m s-1. Bulk modulus of water =2.25×109, ρwater=1000 kg m-3).
HARD
Physics
IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 7 - Superposition and Standing Waves>Exercises>Q 12
A source emitting sound of frequency 180 Hz is placed in front of a wall at distance of 2 m from it. A detector is also placed in front of the wall at the same distance from it. Find the minimum distance (in m ) between the source and the detector for which the detector detects a maximum of sound. Speed of sound in air =360 m/s.
EASY
Physics
IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 7 - Superposition and Standing Waves>Exercises>Q 13
A set of 56 tuning forks is arranged in a sequence of increasing frequencies. If each fork gives 4 beats/s with the preceding one and the last fork is found to be an octave higher of the first, find the frequency of the first fork.
MEDIUM
Physics
IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 7 - Superposition and Standing Waves>Exercises>Q 14
Two tuning forks A and B are sounded together and 8 beats/s are heard. A is in resonance with a column of air 32 cm long in a pipe closed at one end and B is similarly in resonance when the length of the column is increased by one cm. Calculate the frequency of forks.
EASY
Physics
IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 7 - Superposition and Standing Waves>Exercises>Q 15
A certain fork is found to give 2 beats/s when sounded in conjunction with a stretched string vibrating transversely under a tension of either 10.2 or 9.9 kg weight. Calculate the frequency of fork.
HARD
Physics
IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 7 - Superposition and Standing Waves>Exercises>Q 16
Two tuning forks A and B give 18 beats in 2 seconds. A resonates with a closed column of air 15 cm long and B with an open column 30.5 cm long. Calculate their frequencies.