EASY
Physics
IMPORTANT
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An open and a closed pipe have same length. The ratio of frequency of their nth overtone is

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Important Questions on Superposition and Standing Waves

HARD
Physics
IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 7 - Superposition and Standing Waves>Exercises>Q 31
A string is under tension so that its length is increased by 1n times its original length. The ratio of fundamental frequency of longitudinal vibrations and transverse vibrations will be
HARD
Physics
IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 7 - Superposition and Standing Waves>Exercises>Q 32
The frequency of a sonometer wire is 100 Hz. When the weights producing the tension are completely immersed in water, the frequency becomes 80 Hz and on immersing the weights in a certain liquid, the frequency becomes 60 Hz. The specific gravity of the liquid is
MEDIUM
Physics
IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 7 - Superposition and Standing Waves>Exercises>Q 33
An open organ pipe of length l is sounded together with another open organ pipe of length (l+x) in their fundamental tones. Speed of sound in the air is v. The beat frequency heard will be (x≪l).
EASY
Physics
IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 7 - Superposition and Standing Waves>Exercises>Q 34
The frequency of B is 3% greater than that of A. The frequency of C is 2% less than that of A. If B and C produce 8 beats /s, then the frequency of A is
HARD
Physics
IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 7 - Superposition and Standing Waves>Exercises>Q 35
A wire of length l having tension T and radius r vibrates with natural frequency f. Another wire of same metal with length 2l having tension 2T and radius 2r will vibrate with natural frequency
HARD
Physics
IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 7 - Superposition and Standing Waves>Exercises>Q 36
A string of length 1.5 m with its two ends clamped is vibrating in fundamental mode. Amplitude at the centre of the string is 4 mm. Distance between the two points having amplitude 2 mm is
MEDIUM
Physics
IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 7 - Superposition and Standing Waves>Exercises>Q 37
A 75 cm string fixed at both ends produces resonant frequencies 384 Hz and 288 Hz without there being any other resonant frequency between these two. Wave speed for the string is :
MEDIUM
Physics
IMPORTANT
PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 7 - Superposition and Standing Waves>Exercises>Q 38
A string of length l is fixed at both end. It is vibrating in 3rd overtone with maximum amplitude a. The amplitude at a distance l/3 from one end is :-