A ` 5 m` long cylindrical steel wire with radius ` 2xx10 ^(-3) m ` is suspended vertically from a rigid support and carries a bob of mass ` 100 kg ` at the other end . If the bob gets snapped , calculate the change in temperature of the wire ignoring radiation losses. ( Take ` g = 10 m//s ^(2) `)
( For the steel wire , young's modulus `= 2.1 xx10^(11) N//m^(2) ` , Density `= 7860 kg// m^(3) `, Specific heat `= 420 J// kg ^@ C` ) .