Accelerate JEE 2020:Waves Class 3 (09.08.2019)

Sound waves of frequency 660 Hz fall normally on a perfectly reflecting wall. The shortest distance from the wall at which the air particle has maximum amplitude of vibration is (velocity of sound in air is 330 m/s)

Both the strings, show in figure, are made of same material and have same cross section. The pulleys are light. The wave speed of a transverse wave in the string AB is v₁ and in CD it is v₂. The v₁/v₂ is

Two stretched wires A and B of the same lengths vibrate independently. If the radius, density and tension of wire A are respectively twice those of wire B, then the fundamental frequency of vibration of A relative to that of B is

A wave moving with constant speed on a uniform string passes the point x = 0 with amplitude A₀, angular frequency ω₀ and average rate of energy transfer P₀. As the wave travels down the string it gradually loses energy and at the point , the average rate of energy transfer becomes P₀/2 . At the point , angular frequency and amplitude are respectively.