JEE Advanced · 2009 · 12 Apr 2009 · Paper 2 · Waves & Sound

List-I shows four configurations made of straight and semi-circular narrow tubes containing air. A sound wave of wavelength $\lambda =0.29\mathrm{m}$ enters these structures at the point $S$ and a sound detector is placed at $D$. Between the points $S$ and $D$, the sound travels …

Consider a system of three connected strings, $S_1,S_2$ and $S_3$ with uniform linear mass densities $\mu \mathrm{kg}/\mathrm{m}$, $4\mu \mathrm{kg}/\mathrm{m}$ and $16\mu \mathrm{kg}/\mathrm{m}$, respectively, as shown in the figure. $S_1$ and …

An audio transmitter (T) and a receiver (R) are hung vertically from two identical massless strings of length 8 m with their pivots well separated along the $X$ axis. They are pulled from the equilibrium position in opposite directions along the $X$ axis by a small angular am …

Two uniform string of mass per unit length $\mu$ and $4\mu$, and length $L$ and $2L$, respectively, are joined at point O, and tied at two fixed ends P and Q, as shown in the figure. The strings are under a uniform tension T. If we define the frequency …

A source (S) of sound has frequency 240 Hz. When the observer (O) and the source move towards each other at a speed $v$ with respect to the ground (as shown in Case 1 in the figure), the observer measures the frequency of the sound to be 288 Hz. However, when the observer and t …

A string of length 1 m and mass $2\times 10^{-5}\mathrm{kg}$ is under tension T . when the string vibrates, two successive harmonics are found to occur at frequencies 750 Hz and 1000 Hz. The value of tension T is ____ Newton.