The fundamental frequency of a sonometer with a weight of $4\,kg$ is $256\,Hz$ . The weight required to produce its octave is .... $kg-wt$
A$4$
B$12$
C$16$
D$24$
Medium
Download our app for free and get started
C$16$
c The octave has double frequency. Hence, the force should be $4$ times the initial value, i.e., $16\,kg-wt$
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.*
A mass of $20\ kg$ is hanging with support of two strings of same linear mass density. Now pulses are generated in both strings at same time near the joint at mass. Ratio of time, taken by a pulse travel through string $1$ to that taken by pulse on string $2$ is
Two sources of sound of same frequency are placed at a distance of $100\,m$ from each other. An observer moving in between them hears $4$ beats per second. If the distance between the sound sources is increased to $400\,m$, then number of beats heard by him will be :-
The end correction of a resonance column is $1\,cm.$ If the shortest length resonating with the tuning fork is $10\,cm,$ the next resonating length should be ..... $cm$
In stationary waves, distance between a node and its nearest antinode is $20 cm$. The phase difference between two particles having a separation of $60 cm$ will be
A wire of $9.8 \times {10^{ - 3}}kg{m^{ - 1}}$ passes over a frictionless light pulley fixed on the top of a frictionless inclined plane which makes an angle of $30°$ with the horizontal. Masses $m$ and $M$ are tied at the two ends of wire such that $m$ rests on the plane and $M$ hangs freely vertically downwards. The entire system is in equilibrium and a transverse wave propagates along the wire with a velocity of $100 ms^{-1}$. Chose the correct option $m =$ ..... $kg$
Three coherent waves of equal frequencies having amplitude $10 \,\, \mu m$, $4\,\,\mu m$ and $7 \,\,\mu m$ respectively, arrive at a given point with successive phase difference of $\pi /2$. The amplitude of the resulting wave in $mm$ is given by
An observer standing near the sea shore observes $54$ waves per minute. If the wavelength of the water wave is $10m$ then the velocity of water wave is .... $ms^{-1}$
The echo of a gun shot is heard $8\, sec$. after the gun is fired. How far from him is the surface that reflects the sound .... $m$ (velocity of sound in air $= 350 \,m/s$)