Related InterviewSolutions

• Sound waves of frequency `660 Hz` fal normally on a perfectly reflecting wall. The shortest distance from the wall at which the pair particles have maximum amplitude of vibration is ……………… meters.
• Calculate the frequency of `2^(nd)` harmonic in an open organ pipe of length 34 cm if the velocity of sound is 340m/s.
• What is the beat frequency, when two waves of frequency 450 Hz and 456 Hz are superposed?
• Velocity of sound in a medium is 490m/s. two waves of wavelength 98 cm and 100 cm are superposed. Calculate the beat frequency.
• Two sound sources emitting sound each of wavelength `lambda` are fixed at a given distance apart. A listener moves with a velocity `u` along the line joining the two suorces. The number of beats heard by him per second isA. `(2u)/lambda`B. `u/lambda`C. `u/(2lambda)`D. `lambda/u`
• Two waves of wavelength 50 cm and 51 cm produce 12 beat/s . The speed of sound isA. 306 m/sB. 331 m/sC. 340 m/sD. 360 m/s
• A standing wave having 3 nodes and 2 antinodes is formed between two atoms having a distance 1.21Å between them. The wavelength of the standing wave isA. 1.21 ÅB. 1.42ÅC. 6.05ÅD. 3.63Å
• A vehicle, with a horn of frequency n is moving with a velocity of 30 m/s in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency `n + n_(1)`. Then (if the sound velocity in air is 300 m/s)A. `n_(1) = 10 n`B. `n_(1)=0`C. `n_(1)=0.1 n`D. `n_(1)=-0.1 n`
• A vehicle with a horn of frequency n is moving with a velocity of 30m/s in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency n + n1. Then (if the sound velocity in air is 300 m/s)(a) n1 = 10 n (b) n1 = 0 (c) n1 = – 0.1 n (d) n1 = 0.1 n
• Two organ pipes of lengths 65cm and70 cm respectively , are sounded simultaneosly. How many beats per second will be produced between the fundamental of the two pipes ? ( Velocity of sound ` = 330 m //s ) `