H C Verma Solutions for Chapter: Wave Motion and Waves on a String, Exercise 2: OBJECTIVE I

Two periodic waves of amplitudes $A_1$ and $A_2$ pass through a region. If $A_1>A_2$, the difference in the maximum and minimum resultant amplitude possible is

Two waves of equal amplitude $A$, and equal frequency travel in the same direction in a medium. The amplitude of the resultant wave is

Two sine waves travel in the same direction in a medium. The amplitude of each wave is $A$ and the phase difference between the two waves is $120°.$ The resultant amplitude will be

The fundamental frequency of a string is proportional to

A tuning fork of frequency $480 \mathrm{Hz}$ is used to vibrate a sonometer wire having a natural frequency $240 \mathrm{Hz}$. The wire will vibrate with a frequency of

A tuning fork of frequency $480 \mathrm{Hz}$ is used to vibrate a sonometer wire having natural frequency $410 \mathrm{Hz}$. The wire will vibrate with a frequency

A sonometer wire of length $l$ vibrates in fundamental mode when excited by a tuning fork of frequency $416 \mathrm{Hz}$.
If the length is doubled keeping other things same, the string will

A sonometer wire supports a $4 \mathrm{kg}$ load and vibrates in fundamental mode with a tuning fork of frequency $416 \mathrm{Hz}$. The length of the wire between the bridges is now doubled. In order to maintain fundamental mode, the load should be changed to