A long PQR is made by joining two wires PQ and QR of equal radii PQ has length 4.8 m and mass 0.06 kg. QR has length 2.56 m and mass 0.2 Kg. The wire PQR is under a tension of 80 N. A sinusoidal wave – pulseof amplitude 3.5 cm is sent along the wire PQ from the end P. No power is dissipated during the propagation of the wave – pulse Calculate(a) the time taken by the wave – pulse to reach the other end R of the wire, and(b) the amplitude of the reflected and transmitted wave – pulses after the incident wave – pulse crosses the joint Q.

Simran Bhatia , 10 Years ago

Grade 11