Waves Test - 30...

The length of a sonometer wire AB is 110 cm. where should the two bridges be placed from A to divide the wire in three segments whose fundamental frequencies are in the ratio of 1: 2 : 3

A whistle giving out 450 Hz approaches a stationary observer at a speed of 33 m/s The frequency heard by the observer in Hz is [velocity of sound in air= 333 ms^-1 ]

The ends of a stretched wire of length L are fixed at x =0 and x = L. In one experiment, the displacement of the wire is y₁= A sin (πx/L) sin ωt and energy is E₁, and in another experiment its displacement is y₂ = A sin (2πx/L) sin 2 ωt and energy is E₂. Then

Length of a string tied to two rigid supports is 40 cm. Maximum wavelength of a stationary wave produced on it is

A wave y = a sin (ωt - kx) on a string meets with another wave producing a node at x = 0. Then the equation of the unknown wave is

A siren placed at a railway platform is emitting sound of frequency 5 k Hz. A passenger sitting in a moving train A records a frequency of 5.5 k Hz, while the train approaches the siren. During his return journey in a different train B, he records a frequency of 6.0 k HZ. While approaching the same siren. The ratio of velocity of train B to the velocity of train A is

A police car moving at 22 m/s chases a motor cyclist.The policeman sounds his horn at 176 Hz, while both of them move towards a stationary siren of frequency 165 Hz. Calculate the speed of motor cycle if it is given that he does not observe any beats

In the experiment for the determination of speed of sound in air using the resonance column method, the length of the air column that resonates in the fundamental mode, with a tuning fork is 0.1 m. When this length is changed to0.35m, the same tuning fork resonates with the first overtone. Calculate the end correction

When two tuning forks (fork 1 and fork 2) are sounded simultaneously, 4 beats per second are heard. Now, some tape is attached on the prong of the fork 2. When the tuning forks are sounded again, 6 beats per second are heard. If the frequency of fork 1 is 200 Hz, then what was the original frequency of fork 2 ?

An open pipe is in resonance in 2nd harmonic with frequency f₁. Now one end of the tube is closed and frequency is increased to f₂ such that the resonance again occurs in nth harmonic. Choose the correct option