Waves PYQs - Last 10 Years

A steel wire of mass 4 g and length 80 cm is fixed at the two ends. The tension in the wire is 50 N , then the frequency of fourth harmonic is

In the equation for a stationary wave given by $y=5 \cos \frac{\pi x}{25} \sin 100 \pi t$. Here, $x$ is in cm and $t$ in second. A node will not occur at distance $x$ is equal to

The frequency of a sonometer wire is \(100 \mathrm{~Hz}\) When the weights producing the tensions are completely immersed in water, the frequence becomes \(60 \mathrm{~Hz}\) and on immersing the weights in a certain liquid, the frequency be...

A person is standing at some point between two parallel cliffs (not exactly at the centre). He claps, and hears two echoes: the first after \(1 \mathrm{~s}\) and the second after \(2 \mathrm{~s}\). If the speed of sound in air is $$330 \mat...