A metal wire of length l and cross-sectionalarea A has mass m. It is stretchedby an amount.e. by a load of mass M. If the wire breaks at the point of suspensiondue to the load then find the rise in temperatureof the wire?

A metal wire of length l and cross-sectionalarea A has mass m. It is s

1.	A metal wire of length l and cross-sectionalarea A has mass m. It is stretchedby an amount.e. by a load of mass M. If the wire breaks at the point of suspensiondue to the load then find the rise in temperatureof the wire?
Answer» Solution :Strain energy `=(1)/(2) F.e =(1)/(2) (Mg) e` As thewire BREAKS strain energy stored in the wire appears in the form of HEAT. `therefore (1)/(2) (Mg)e=ms Deltat` [s = SPECIFIC heat of wire] `Deltat=((Mg)e)/(2ms)`