Question

Figure shows the shape of part of a long string in which transverse waves are produced by attaching one end of the string to tuning fork of frequency 250 Hz. What is the velocity of the waves?

                                                  

Solution

Correct option is

It is clear from the figure that the wavelength  Now V = 250 Hz. Therefore v = Vλ = 250 × 0.4 = 100 cm s–1 = 1 ms –1.

SIMILAR QUESTIONS

Q1

 

Two masses m1 and m2 are suspended together by a massless spring of force constant k (see fig). When the masses are in equilibrium, mass m1 is removed without disturbing the system. The angular frequency of oscillation of mass m2 is   

Q2

A mass m is suspended at the end of a massless wire of length L and cross-sectional area A. If Y is the Young’s modulus of the material of the wire, the frequency of oscillations along the vertical line is given by

Q3

A test tube of cross-sectional area a has some lead shots in it. The total mass is m. It floats upright in a liquid of density d. When pushed down a little and released, it oscillates up and down with a period T. Use dimensional considerations and choose the correct relationship from the following.

Q4

 

When a wave travels in a medium, the particle displacements are given by

                   

Where y and x are in meters and t in seconds. The wavelength of the wave is

Q5

Transverse wave of amplitude 10 cm is generated at one end (x = 0) of a long string by a tuning fork of frequency 500 Hz. At a certain instant of time, the displacement of a particle A at x = 100 cm is – 5 cm and of particle B at x = 200 cm is +5 cm. What is the wavelength of the wave?

Q6

Transverse waves of the same frequency are generated in two steel wires A and B. The diameter of A is twice that of B and the tension in A is half that in B. The ratio of the velocities of waves in A and B is

Q7

A sonometer wire, with a suspended mass of M = 1 kg, is in resonance with a given tuning fork. The apparatus is taken to the moon where the acceleration due to gravity is 1/6 that on earth. To obtain resonance on the moon, the value of M should be

Q8

A source of sound vibrates according to the equation y = 0.05 cos π t. It sends waves of velocity 1.5 ms –1. The wavelength of the waves is    

Q9

Two identical waves, each of frequency 10 Hz, are travelling in opposite directions in a medium with a speed of 20 cm s–1. The distance between adjacent nodes is

Q10

 

Particle displacements (in cm) in a standing wave are given by 

                     

The distance between a node and the next anti-node is