Embibe Experts Solutions for Chapter: Wave Motion on a String, Exercise 1: Exercise 1

When a sound wave is reflected from the boundary of a denser medium, the compression of the incident wave is returned as:

The frequency from $3\times {10}^9 \mathrm{Hz}$ to $3\times {10}^{10} \mathrm{Hz}$ is

A copper wire is held at the two ends by rigid supports. At $30°\mathrm{C}$ the wire is just taut, with negligible tension. The speed of transverse waves in this wire at $10°\mathrm{C}$ is:

$\left(\mathrm{\alpha }=1.7\times {10}^{-5}°\mathrm{C},\mathrm{Y}=1.3\times {10}^{11} \mathrm{N}/{\mathrm{m}}^2, \mathrm{d}=9\times {10}^3 \mathrm{kg}/{\mathrm{m}}^3\right).$

In travelling waves, the relation between particle velocity $v_p{v}_p,$ wave velocity $v$ and wave shape slope $m$ is given by

A certain transverse sinusoidal wave of wavelength $20 \mathrm{cm}$ is moving in the positive $X$ direction. The transverse velocity of the particle at $x=0$ as a function of time is shown. The amplitude of the motion is

Both the strings, show, in figure, are made of same material and have same cross-section. The pulleys are light. The wave speed of a transverse wave in the string $AB$ is $v_1$ and in $CD$ it is $v_2.$ The $v_1/v_2$ is

With reference to transverse wave travelling in $\mathrm{X}$-direction. Incorrect relation of the following is (symbols have their usual meaning)

A wave is reflected from a rigid support. The change in the phase of the reflected wave will be