Fundamental frequency of an open pipe of length $0.5 m$ is equal to the frequency of the first overtone of a closed pipe of length $l$. The value of $l_c$ is $(m)$
A$1.5$
B$0.75$
C$2$
D$1$
Medium
Download our app for free and get started
B$0.75$
b (b) First tone of open pipe = first overtone of closed pipe
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.*
stationary source is emitting sound at a fixed frequency $f_0$, which is reflected by two cars approaching the source. The difference between the frequencies of sound reflected from the cars is $1.2\%$ of $f_0$. What is the difference in the speeds of the cars (in $km$ per hour) to the nearest integer ..... $km/hr$ ? The cars are moving at constant speeds much smaller than the speed of sound which is $330$ $ms^{-1}$.
Two cars ${X}$ and ${Y}$ are approaching each other with velocities $36\; {km} / {h}$ and $72\; {km} / {h}$ respectively. The frequency of a whistle sound as emitted by a passenger in car ${X}$, heard by the passenger in car ${Y}$ is $1320 \;{Hz}$. If the velocity of sound in air is $340\; {m} / {s}$, the actual frequency of the whistle sound produced is ........ $Hz.$
A person in front of a mountain is beating a drum at the rate of $40$ per minute and hears no distinct echo. If the person moves $90 \,m$ closer to the mountain, he has to beat the drum at $60$ per minute to not hear any distinct echo. The speed of sound is .............. $ms^{-1}$
When a wave travels in a medium, the particle displacements are given by $y = a\, sin\, 2\pi\, (bt -cx)$ where $a, b,$ and $c$ are constants. The maximum particle velocity will be twice the wave velocity if
The fundamental frequency in an open organ pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is $20\, cm,$ the length of the open organ pipe is .... $cm$
A source of sound of frequency $450$ cycles/sec is moving towards a stationary observer with $34\, m/sec$ speed. If the speed of sound is $340\, m/sec,$ then the apparent frequency will be ..... $cycles/sec$