Question

At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of the string at that instant is a

Solution

Correct option is

Straight line

At maximum displacement, the energy is entirely potential. When the particles pass through the mean position, they have maximum velocity and hence maximum kinetic energy. At that instant the appearance of the string is straight.

SIMILAR QUESTIONS

Q1

 

The frequency of the sound of a car horn as received by an observer towards whom the car is moving differs from the frequency of the horn by 2.5%. If the speed of sound in air is

320 ms–1, the speed of the car is

Q2

A cylindrical tube, open at both ends, has a fundamental frequency V in air. The tube is dipped vertically in water so that half of it is inside water. The fundamental frequency of the air column now is

Q3

The intensity of a sound wave falls by 10% in travelling a distance of 1 metre in a medium. If the initial intensity of the sound wave was 100 decibels, its value after it passes through 3 metres thickness of the medium will be

Q4

A tube closed at one end containing air, produces, when excited, the fundamental note of frequency 512 Hz. If the tube is open at both ends, the fundamental frequency that can be excited in (in Hz)

Q5

Two second waves of equal intensity I produce beats. The maximum intensity of sound produced in beats will be

Q6

Two waves of wavelength 2 m and 2.02 m moving with the same speed superpose to produce 2 beats per second. The speed of each wave is

Q7

The potential energy of a particle executing simple harmonic motion at a distance x from the equilibrium position is proportional to

Q8

 

Two travelling waves

                      

and                

are superposed on a string. The distance between adjacent nodes is

Q9

If the amplitude of a sound wave is doubled and its frequency reduced to one-fourth, the intensity of sound at the same point will

Q10

 

The displacement y of a particle executing simple harmonic motion is given by 

                                     

The expression may be considered to be a result of the superposition of how many simple harmonic motions?