Embibe Experts Solutions for Chapter: Sound Waves, 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 equation of a progressive wave is, $y=0.02\sin 2\pi \left[\frac{t}{0.01}-\frac{x}{0.3}\right]$ where, $x$ and $y$ are in $\mathrm{meters}$ and $t$ is in $\mathrm{second}$. The velocity of propagation of the wave is,

Which of the following has the minimum frequency?

A simple harmonic oscillator has an amplitude $a$ and time period $T.$ The time required by it to travel from $x=a$ to $x=\frac{a}{2}$ is 

The velocity factor of a transmission line $x,$ if dielectric constant of the medium is $2.6,$ the value of $x$ is

Ultrasonic waves of frequency $3\times {10}^5 \mathrm{Hz}$ are passed through a medium where the speed of sound is $10$ times that in air (speed of sound in air is $300 \mathrm{m} {\mathrm{s}}^{-1}$). The wavelength of this wave in that medium will be of the order of,

A travelling wave on a string is given by $y=A\sin \left[\alpha x+\beta t+\frac{\mathrm{\pi }}{6}\right]$. The displacement and velocity of oscillation of a point $\alpha =0.56 {\mathrm{cm}}^{-1}$, $\beta =12 {\sec }^{-1}$, $A=7.5 \mathrm{cm}$, $x=1 \mathrm{cm}$ and $t=1 \mathrm{s}$ is

The equation of a progressive wave is given by, $y=a\sin (\omega t-kx)$. Then, which of the following equations is not correct?