An alumionium wire of cross sectional area is1×10-6 is joined to steel wire of same cross sectional area. Coumpound wire is strecthed on sonometer, pulled by weight 10kg. Total length of compound wire between bridge is 1.5m, of aluminium is 0.6m and rest is steel wire. Transverse vibration are set up in wire by using an external force of variable fr4equency. Find lowest frequency of excitation for standing waves are formed such that joint in wire is node. What is total number of nodes observed at this frequency excluding two at ends of wire (density of Al is 2×103 Kg/m3 and steel is 1.04×104 Kg/m3)

Akshay chippigiri , 7 Years ago

Grade 12