$Assertion :$ Doppler formula for sound wave is symmetric with respect to the speed of source and speed of observer.
$Reason :$ Motion of source with respect to stationary observer is not equivalent to the motion of an observer with respect to stationary source.
AIIMS 2014, Easy
Download our app for free and get started
Reason is correct, Assertion is incorrect. In doppler for sound wave effect due to observer and source motion are different.
Download our app
and get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Sound waves travel at $350\,\, m/s$ through a warm air and at $3500\,\, m/s$ through brass. The wavelength of a $700\,\, Hz$ acoustic wave as it enters brass from warm air
The extension in a string obeying Hooke's law is $x.$ The speed of sound in the stretched string is $v.$ If the extension in the string is increased to $1.5x$, the speed of sound will be
A pipe’s lower end is immersed in water such that the length of air column from the top open end has a certain length $25\,\, cm$. The speed of sound in air is $350 \,\,m/s$. The air column is found to resonate with a tuning fork of frequency $1750 \,\,Hz$. By what minimum distance should the pipe be raised in order to make the air column resonate again with the same tuning fork ... $cm$ ?
A source of frequency $150 Hz$ is moving in the direction of a person with a velocity of $110\, m/s$. The frequency heard by the person will be .... $Hz$ (speed of sound in medium $= 330 m/s$)
The driver of a car travelling with speed $30 \,m / s$ towards a hill sounds a horn of frequency $600 \,Hz$. If the velocity of sound in air is $330 \,m / s$, the frequency of reflected sound as heard by driver is ........ $Hz$
Figure shown 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 .... $ms^{-1}$ ?
The $(x, y)$ coordinates of the corners of a square plate are $(0, 0), (L, 0), (L, L)$ and $(0, L).$ The edges of the plate are clamped and transverse standing waves are set up in it. If $u(x, y)$ denotes the displacement of the plate at the point $(x, y)$ at some instant of time, the possible expression(s) for $u$ is(are) ($a =$ positive constant)