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Class XI Physics Waves 6

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Question 1

The displacement y (in cm) produced by a simple harmonic wave is given by y = (10/π) sin (

). The period and maximum velocity of the particles in the medium respectively will be given by-

Question 2

A stretched string of 1 m length, fixed at both ends, having a mass of 5 x 10^-4 kg is under a tension of 20 N. It is plucked at a point situated at 25 cm from one end. The stretched string would vibrate with a frequency (in Hz) of

Question 3

The total number of harmonics audible to a person having normal hearing, if the length of the open pipe is 17cm and velocity of sound in air is 340 m/s, is - (Given, Audible range- 20Hz to 20000Hz)

Question 4

An earthquake generates both transverse (S) and longitudinal (P) sound waves in the earth. The speed of S waves is about 4.5 km/s and that of P waves is about 8.0 km/s. A seismograph records P and S waves from an earthquake. The first P wave arrives 4.0 minute before the first S wave. The epicentre of the earthquake is located at a distance of about -

Question 5

When an engine passes near to a stationary observer then its apparent frequencies occurs in the ratio 5/3. If the velocity of engine is-

Question 6

Two identical organ pipe are producing fundamental notes of frequencies 200 Hz at 15 ºC, if the temperature of one pipe is raised to 27 ºC, the number of beats produced will be–

Question 7

Two uniform wires are vibrating simultaneously in their fundamental notes. The tensions, lengths, diameters, and the densities of the two wires are in the ratios 8 : 1, 36 : 35, 4 : 1 and 1 : 2 respectively. If the note of the higher pitch has a frequency 360 Hz, the number of beats produced per seconds is –

Question 8

In a sonometer wire, the tension is maintained by suspending a 50.7-kg mass from the free end of the wire. The suspended mass has a volume of 0.0075 m³. The fundamental frequency of the wire is 260 Hz. If the suspended mass is completely submerged in water, the fundamental frequency will become-

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Oct 1JEE & BITSAT